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-rw-r--r--src/librustdoc/html/render.rs2705
1 files changed, 1520 insertions, 1185 deletions
diff --git a/src/librustdoc/html/render.rs b/src/librustdoc/html/render.rs
index 100aed1af19..506f84baaa5 100644
--- a/src/librustdoc/html/render.rs
+++ b/src/librustdoc/html/render.rs
@@ -32,46 +32,46 @@ use std::collections::{BTreeMap, VecDeque};
 use std::default::Default;
 use std::error;
 
-use std::fmt::{self, Formatter, Write};
 use std::ffi::OsStr;
+use std::fmt::{self, Formatter, Write};
 use std::fs::{self, File};
 use std::io::prelude::*;
 use std::io::{self, BufReader};
-use std::path::{PathBuf, Path, Component};
+use std::path::{Component, Path, PathBuf};
+use std::rc::Rc;
 use std::str;
 use std::sync::Arc;
-use std::rc::Rc;
 
 use errors;
-use serde::{Serialize, Serializer};
-use serde::ser::SerializeSeq;
-use syntax::ast;
-use syntax::edition::Edition;
-use syntax::print::pprust;
-use syntax::source_map::FileName;
-use syntax::symbol::{Symbol, sym};
-use syntax_pos::hygiene::MacroKind;
 use rustc::hir::def_id::DefId;
+use rustc::hir::{self, Mutability};
 use rustc::middle::privacy::AccessLevels;
 use rustc::middle::stability;
-use rustc::hir::{self, Mutability};
 use rustc::util::nodemap::{FxHashMap, FxHashSet};
 use rustc_data_structures::flock;
 use rustc_feature::UnstableFeatures;
+use serde::ser::SerializeSeq;
+use serde::{Serialize, Serializer};
+use syntax::ast;
+use syntax::edition::Edition;
+use syntax::print::pprust;
+use syntax::source_map::FileName;
+use syntax::symbol::{sym, Symbol};
+use syntax_pos::hygiene::MacroKind;
 
 use crate::clean::{self, AttributesExt, Deprecation, GetDefId, SelfTy};
 use crate::config::RenderOptions;
 use crate::docfs::{DocFS, ErrorStorage, PathError};
 use crate::doctree;
 use crate::html::escape::Escape;
-use crate::html::format::{Buffer, PrintWithSpace, print_abi_with_space};
-use crate::html::format::{print_generic_bounds, WhereClause, href, print_default_space};
-use crate::html::format::{Function};
 use crate::html::format::fmt_impl_for_trait_page;
+use crate::html::format::Function;
+use crate::html::format::{href, print_default_space, print_generic_bounds, WhereClause};
+use crate::html::format::{print_abi_with_space, Buffer, PrintWithSpace};
 use crate::html::item_type::ItemType;
-use crate::html::markdown::{self, Markdown, MarkdownHtml, MarkdownSummaryLine, ErrorCodes, IdMap};
-use crate::html::{highlight, layout, static_files};
+use crate::html::markdown::{self, ErrorCodes, IdMap, Markdown, MarkdownHtml, MarkdownSummaryLine};
 use crate::html::sources;
+use crate::html::{highlight, layout, static_files};
 
 use minifier;
 
@@ -88,11 +88,7 @@ pub type NameDoc = (String, Option<String>);
 
 crate fn ensure_trailing_slash(v: &str) -> impl fmt::Display + '_ {
     crate::html::format::display_fn(move |f| {
-        if !v.ends_with("/") && !v.is_empty() {
-            write!(f, "{}/", v)
-        } else {
-            write!(f, "{}", v)
-        }
+        if !v.ends_with("/") && !v.is_empty() { write!(f, "{}/", v) } else { write!(f, "{}", v) }
     })
 }
 
@@ -121,31 +117,29 @@ impl std::fmt::Display for Error {
 
 impl PathError for Error {
     fn new<P: AsRef<Path>>(e: io::Error, path: P) -> Error {
-        Error {
-            file: path.as_ref().to_path_buf(),
-            error: e,
-        }
+        Error { file: path.as_ref().to_path_buf(), error: e }
     }
 }
 
 macro_rules! try_none {
-    ($e:expr, $file:expr) => ({
+    ($e:expr, $file:expr) => {{
         use std::io;
         match $e {
             Some(e) => e,
-            None => return Err(Error::new(io::Error::new(io::ErrorKind::Other, "not found"),
-                                          $file))
+            None => {
+                return Err(Error::new(io::Error::new(io::ErrorKind::Other, "not found"), $file));
+            }
         }
-    })
+    }};
 }
 
 macro_rules! try_err {
-    ($e:expr, $file:expr) => ({
+    ($e:expr, $file:expr) => {{
         match $e {
             Ok(e) => e,
             Err(e) => return Err(Error::new(e, $file)),
         }
-    })
+    }};
 }
 
 /// Major driving force in all rustdoc rendering. This contains information
@@ -225,12 +219,7 @@ impl Context {
         let mut iter = filename.splitn(2, '.');
         let base = iter.next().unwrap();
         let ext = iter.next().unwrap();
-        let filename = format!(
-            "{}{}.{}",
-            base,
-            self.shared.resource_suffix,
-            ext,
-        );
+        let filename = format!("{}{}.{}", base, self.shared.resource_suffix, ext,);
         self.dst.join(&filename)
     }
 }
@@ -267,7 +256,7 @@ impl Impl {
     fn inner_impl(&self) -> &clean::Impl {
         match self.impl_item.inner {
             clean::ImplItem(ref impl_) => impl_,
-            _ => panic!("non-impl item found in impl")
+            _ => panic!("non-impl item found in impl"),
         }
     }
 
@@ -312,14 +301,7 @@ impl Serialize for IndexItem {
     {
         assert_eq!(self.parent.is_some(), self.parent_idx.is_some());
 
-        (
-            self.ty,
-            &self.name,
-            &self.path,
-            &self.desc,
-            self.parent_idx,
-            &self.search_type,
-        )
+        (self.ty, &self.name, &self.path, &self.desc, self.parent_idx, &self.search_type)
             .serialize(serializer)
     }
 }
@@ -388,31 +370,36 @@ thread_local!(pub static CURRENT_DEPTH: Cell<usize> = Cell::new(0));
 
 pub fn initial_ids() -> Vec<String> {
     [
-     "main",
-     "search",
-     "help",
-     "TOC",
-     "render-detail",
-     "associated-types",
-     "associated-const",
-     "required-methods",
-     "provided-methods",
-     "implementors",
-     "synthetic-implementors",
-     "implementors-list",
-     "synthetic-implementors-list",
-     "methods",
-     "deref-methods",
-     "implementations",
-    ].iter().map(|id| (String::from(*id))).collect()
+        "main",
+        "search",
+        "help",
+        "TOC",
+        "render-detail",
+        "associated-types",
+        "associated-const",
+        "required-methods",
+        "provided-methods",
+        "implementors",
+        "synthetic-implementors",
+        "implementors-list",
+        "synthetic-implementors-list",
+        "methods",
+        "deref-methods",
+        "implementations",
+    ]
+    .iter()
+    .map(|id| (String::from(*id)))
+    .collect()
 }
 
 /// Generates the documentation for `crate` into the directory `dst`
-pub fn run(mut krate: clean::Crate,
-           options: RenderOptions,
-           renderinfo: RenderInfo,
-           diag: &errors::Handler,
-           edition: Edition) -> Result<(), Error> {
+pub fn run(
+    mut krate: clean::Crate,
+    options: RenderOptions,
+    renderinfo: RenderInfo,
+    diag: &errors::Handler,
+    edition: Edition,
+) -> Result<(), Error> {
     // need to save a copy of the options for rendering the index page
     let md_opts = options.clone();
     let RenderOptions {
@@ -442,10 +429,7 @@ pub fn run(mut krate: clean::Crate,
     // If user passed in `--playground-url` arg, we fill in crate name here
     let mut playground = None;
     if let Some(url) = playground_url {
-        playground = Some(markdown::Playground {
-            crate_name: Some(krate.name.clone()),
-            url,
-        });
+        playground = Some(markdown::Playground { crate_name: Some(krate.name.clone()), url });
     }
     let mut layout = layout::Layout {
         logo: String::new(),
@@ -507,12 +491,8 @@ pub fn run(mut krate: clean::Crate,
     let dst = output;
     scx.ensure_dir(&dst)?;
     krate = sources::render(&dst, &mut scx, krate)?;
-    let (new_crate, index, cache) = Cache::from_krate(
-        renderinfo,
-        &extern_html_root_urls,
-        &dst,
-        krate,
-    );
+    let (new_crate, index, cache) =
+        Cache::from_krate(renderinfo, &extern_html_root_urls, &dst, krate);
     krate = new_crate;
     let cache = Arc::new(cache);
     let mut cx = Context {
@@ -562,15 +542,24 @@ fn write_shared(
     // Add all the static files. These may already exist, but we just
     // overwrite them anyway to make sure that they're fresh and up-to-date.
 
-    write_minify(&cx.shared.fs, cx.path("rustdoc.css"),
-                 static_files::RUSTDOC_CSS,
-                 options.enable_minification)?;
-    write_minify(&cx.shared.fs, cx.path("settings.css"),
-                 static_files::SETTINGS_CSS,
-                 options.enable_minification)?;
-    write_minify(&cx.shared.fs, cx.path("noscript.css"),
-                 static_files::NOSCRIPT_CSS,
-                 options.enable_minification)?;
+    write_minify(
+        &cx.shared.fs,
+        cx.path("rustdoc.css"),
+        static_files::RUSTDOC_CSS,
+        options.enable_minification,
+    )?;
+    write_minify(
+        &cx.shared.fs,
+        cx.path("settings.css"),
+        static_files::SETTINGS_CSS,
+        options.enable_minification,
+    )?;
+    write_minify(
+        &cx.shared.fs,
+        cx.path("noscript.css"),
+        static_files::NOSCRIPT_CSS,
+        options.enable_minification,
+    )?;
 
     // To avoid "light.css" to be overwritten, we'll first run over the received themes and only
     // then we'll run over the "official" styles.
@@ -584,7 +573,7 @@ fn write_shared(
         themes.insert(theme.to_owned());
     }
 
-    let write = |p, c| { cx.shared.fs.write(p, c) };
+    let write = |p, c| cx.shared.fs.write(p, c);
     if (*cx.shared).layout.logo.is_empty() {
         write(cx.path("rust-logo.png"), static_files::RUST_LOGO)?;
     }
@@ -594,11 +583,19 @@ fn write_shared(
     write(cx.path("brush.svg"), static_files::BRUSH_SVG)?;
     write(cx.path("wheel.svg"), static_files::WHEEL_SVG)?;
     write(cx.path("down-arrow.svg"), static_files::DOWN_ARROW_SVG)?;
-    write_minify(&cx.shared.fs,
-        cx.path("light.css"), static_files::themes::LIGHT, options.enable_minification)?;
+    write_minify(
+        &cx.shared.fs,
+        cx.path("light.css"),
+        static_files::themes::LIGHT,
+        options.enable_minification,
+    )?;
     themes.insert("light".to_owned());
-    write_minify(&cx.shared.fs,
-        cx.path("dark.css"), static_files::themes::DARK, options.enable_minification)?;
+    write_minify(
+        &cx.shared.fs,
+        cx.path("dark.css"),
+        static_files::themes::DARK,
+        options.enable_minification,
+    )?;
     themes.insert("dark".to_owned());
 
     let mut themes: Vec<&String> = themes.iter().collect();
@@ -652,33 +649,43 @@ themePicker.onblur = handleThemeButtonsBlur;
     }};
     but.onblur = handleThemeButtonsBlur;
     themes.appendChild(but);
-}});"#, serde_json::to_string(&themes).unwrap());
-
-    write_minify(&cx.shared.fs, cx.path("theme.js"),
-                 &theme_js,
-                 options.enable_minification)?;
-    write_minify(&cx.shared.fs, cx.path("main.js"),
-                 static_files::MAIN_JS,
-                 options.enable_minification)?;
-    write_minify(&cx.shared.fs, cx.path("settings.js"),
-                 static_files::SETTINGS_JS,
-                 options.enable_minification)?;
+}});"#,
+        serde_json::to_string(&themes).unwrap()
+    );
+
+    write_minify(&cx.shared.fs, cx.path("theme.js"), &theme_js, options.enable_minification)?;
+    write_minify(
+        &cx.shared.fs,
+        cx.path("main.js"),
+        static_files::MAIN_JS,
+        options.enable_minification,
+    )?;
+    write_minify(
+        &cx.shared.fs,
+        cx.path("settings.js"),
+        static_files::SETTINGS_JS,
+        options.enable_minification,
+    )?;
     if cx.shared.include_sources {
         write_minify(
             &cx.shared.fs,
             cx.path("source-script.js"),
             static_files::sidebar::SOURCE_SCRIPT,
-            options.enable_minification)?;
+            options.enable_minification,
+        )?;
     }
 
     {
         write_minify(
             &cx.shared.fs,
             cx.path("storage.js"),
-            &format!("var resourcesSuffix = \"{}\";{}",
-                     cx.shared.resource_suffix,
-                     static_files::STORAGE_JS),
-            options.enable_minification)?;
+            &format!(
+                "var resourcesSuffix = \"{}\";{}",
+                cx.shared.resource_suffix,
+                static_files::STORAGE_JS
+            ),
+            options.enable_minification,
+        )?;
     }
 
     if let Some(ref css) = cx.shared.layout.css_file_extension {
@@ -690,41 +697,27 @@ themePicker.onblur = handleThemeButtonsBlur;
             write_minify(&cx.shared.fs, out, &buffer, options.enable_minification)?;
         }
     }
-    write_minify(&cx.shared.fs, cx.path("normalize.css"),
-                 static_files::NORMALIZE_CSS,
-                 options.enable_minification)?;
-    write(cx.dst.join("FiraSans-Regular.woff"),
-          static_files::fira_sans::REGULAR)?;
-    write(cx.dst.join("FiraSans-Medium.woff"),
-          static_files::fira_sans::MEDIUM)?;
-    write(cx.dst.join("FiraSans-LICENSE.txt"),
-          static_files::fira_sans::LICENSE)?;
-    write(cx.dst.join("SourceSerifPro-Regular.ttf.woff"),
-          static_files::source_serif_pro::REGULAR)?;
-    write(cx.dst.join("SourceSerifPro-Bold.ttf.woff"),
-          static_files::source_serif_pro::BOLD)?;
-    write(cx.dst.join("SourceSerifPro-It.ttf.woff"),
-          static_files::source_serif_pro::ITALIC)?;
-    write(cx.dst.join("SourceSerifPro-LICENSE.md"),
-          static_files::source_serif_pro::LICENSE)?;
-    write(cx.dst.join("SourceCodePro-Regular.woff"),
-          static_files::source_code_pro::REGULAR)?;
-    write(cx.dst.join("SourceCodePro-Semibold.woff"),
-          static_files::source_code_pro::SEMIBOLD)?;
-    write(cx.dst.join("SourceCodePro-LICENSE.txt"),
-          static_files::source_code_pro::LICENSE)?;
-    write(cx.dst.join("LICENSE-MIT.txt"),
-          static_files::LICENSE_MIT)?;
-    write(cx.dst.join("LICENSE-APACHE.txt"),
-          static_files::LICENSE_APACHE)?;
-    write(cx.dst.join("COPYRIGHT.txt"),
-          static_files::COPYRIGHT)?;
-
-    fn collect(
-        path: &Path,
-        krate: &str,
-        key: &str,
-    ) -> io::Result<(Vec<String>, Vec<String>)> {
+    write_minify(
+        &cx.shared.fs,
+        cx.path("normalize.css"),
+        static_files::NORMALIZE_CSS,
+        options.enable_minification,
+    )?;
+    write(cx.dst.join("FiraSans-Regular.woff"), static_files::fira_sans::REGULAR)?;
+    write(cx.dst.join("FiraSans-Medium.woff"), static_files::fira_sans::MEDIUM)?;
+    write(cx.dst.join("FiraSans-LICENSE.txt"), static_files::fira_sans::LICENSE)?;
+    write(cx.dst.join("SourceSerifPro-Regular.ttf.woff"), static_files::source_serif_pro::REGULAR)?;
+    write(cx.dst.join("SourceSerifPro-Bold.ttf.woff"), static_files::source_serif_pro::BOLD)?;
+    write(cx.dst.join("SourceSerifPro-It.ttf.woff"), static_files::source_serif_pro::ITALIC)?;
+    write(cx.dst.join("SourceSerifPro-LICENSE.md"), static_files::source_serif_pro::LICENSE)?;
+    write(cx.dst.join("SourceCodePro-Regular.woff"), static_files::source_code_pro::REGULAR)?;
+    write(cx.dst.join("SourceCodePro-Semibold.woff"), static_files::source_code_pro::SEMIBOLD)?;
+    write(cx.dst.join("SourceCodePro-LICENSE.txt"), static_files::source_code_pro::LICENSE)?;
+    write(cx.dst.join("LICENSE-MIT.txt"), static_files::LICENSE_MIT)?;
+    write(cx.dst.join("LICENSE-APACHE.txt"), static_files::LICENSE_APACHE)?;
+    write(cx.dst.join("COPYRIGHT.txt"), static_files::COPYRIGHT)?;
+
+    fn collect(path: &Path, krate: &str, key: &str) -> io::Result<(Vec<String>, Vec<String>)> {
         let mut ret = Vec::new();
         let mut krates = Vec::new();
 
@@ -738,23 +731,28 @@ themePicker.onblur = handleThemeButtonsBlur;
                     continue;
                 }
                 ret.push(line.to_string());
-                krates.push(line[key.len() + 2..].split('"')
-                                                 .next()
-                                                 .map(|s| s.to_owned())
-                                                 .unwrap_or_else(|| String::new()));
+                krates.push(
+                    line[key.len() + 2..]
+                        .split('"')
+                        .next()
+                        .map(|s| s.to_owned())
+                        .unwrap_or_else(|| String::new()),
+                );
             }
         }
         Ok((ret, krates))
     }
 
     fn show_item(item: &IndexItem, krate: &str) -> String {
-        format!("{{'crate':'{}','ty':{},'name':'{}','desc':'{}','p':'{}'{}}}",
-                krate, item.ty as usize, item.name, item.desc.replace("'", "\\'"), item.path,
-                if let Some(p) = item.parent_idx {
-                    format!(",'parent':{}", p)
-                } else {
-                    String::new()
-                })
+        format!(
+            "{{'crate':'{}','ty':{},'name':'{}','desc':'{}','p':'{}'{}}}",
+            krate,
+            item.ty as usize,
+            item.name,
+            item.desc.replace("'", "\\'"),
+            item.path,
+            if let Some(p) = item.parent_idx { format!(",'parent':{}", p) } else { String::new() }
+        )
     }
 
     let dst = cx.dst.join(&format!("aliases{}.js", cx.shared.resource_suffix));
@@ -763,14 +761,13 @@ themePicker.onblur = handleThemeButtonsBlur;
         let mut output = String::with_capacity(100);
         for (alias, items) in &cx.cache.aliases {
             if items.is_empty() {
-                continue
+                continue;
             }
-            output.push_str(&format!("\"{}\":[{}],",
-                                     alias,
-                                     items.iter()
-                                          .map(|v| show_item(v, &krate.name))
-                                          .collect::<Vec<_>>()
-                                          .join(",")));
+            output.push_str(&format!(
+                "\"{}\":[{}],",
+                alias,
+                items.iter().map(|v| show_item(v, &krate.name)).collect::<Vec<_>>().join(",")
+            ));
         }
         all_aliases.push(format!("ALIASES[\"{}\"] = {{{}}};", krate.name, output));
         all_aliases.sort();
@@ -793,55 +790,49 @@ themePicker.onblur = handleThemeButtonsBlur;
 
     impl Hierarchy {
         fn new(elem: OsString) -> Hierarchy {
-            Hierarchy {
-                elem,
-                children: FxHashMap::default(),
-                elems: FxHashSet::default(),
-            }
+            Hierarchy { elem, children: FxHashMap::default(), elems: FxHashSet::default() }
         }
 
         fn to_json_string(&self) -> String {
             let mut subs: Vec<&Hierarchy> = self.children.values().collect();
             subs.sort_unstable_by(|a, b| a.elem.cmp(&b.elem));
-            let mut files = self.elems.iter()
-                                      .map(|s| format!("\"{}\"",
-                                                       s.to_str()
-                                                        .expect("invalid osstring conversion")))
-                                      .collect::<Vec<_>>();
+            let mut files = self
+                .elems
+                .iter()
+                .map(|s| format!("\"{}\"", s.to_str().expect("invalid osstring conversion")))
+                .collect::<Vec<_>>();
             files.sort_unstable_by(|a, b| a.cmp(b));
             let subs = subs.iter().map(|s| s.to_json_string()).collect::<Vec<_>>().join(",");
-            let dirs = if subs.is_empty() {
-                String::new()
-            } else {
-                format!(",\"dirs\":[{}]", subs)
-            };
+            let dirs =
+                if subs.is_empty() { String::new() } else { format!(",\"dirs\":[{}]", subs) };
             let files = files.join(",");
-            let files = if files.is_empty() {
-                String::new()
-            } else {
-                format!(",\"files\":[{}]", files)
-            };
-            format!("{{\"name\":\"{name}\"{dirs}{files}}}",
-                    name=self.elem.to_str().expect("invalid osstring conversion"),
-                    dirs=dirs,
-                    files=files)
+            let files =
+                if files.is_empty() { String::new() } else { format!(",\"files\":[{}]", files) };
+            format!(
+                "{{\"name\":\"{name}\"{dirs}{files}}}",
+                name = self.elem.to_str().expect("invalid osstring conversion"),
+                dirs = dirs,
+                files = files
+            )
         }
     }
 
     if cx.shared.include_sources {
         let mut hierarchy = Hierarchy::new(OsString::new());
-        for source in cx.shared.local_sources.iter()
-                                             .filter_map(|p| p.0.strip_prefix(&cx.shared.src_root)
-                                                                .ok()) {
+        for source in cx
+            .shared
+            .local_sources
+            .iter()
+            .filter_map(|p| p.0.strip_prefix(&cx.shared.src_root).ok())
+        {
             let mut h = &mut hierarchy;
-            let mut elems = source.components()
-                                  .filter_map(|s| {
-                                      match s {
-                                          Component::Normal(s) => Some(s.to_owned()),
-                                          _ => None,
-                                      }
-                                  })
-                                  .peekable();
+            let mut elems = source
+                .components()
+                .filter_map(|s| match s {
+                    Component::Normal(s) => Some(s.to_owned()),
+                    _ => None,
+                })
+                .peekable();
             loop {
                 let cur_elem = elems.next().expect("empty file path");
                 if elems.peek().is_none() {
@@ -857,12 +848,16 @@ themePicker.onblur = handleThemeButtonsBlur;
 
         let dst = cx.dst.join(&format!("source-files{}.js", cx.shared.resource_suffix));
         let (mut all_sources, _krates) = try_err!(collect(&dst, &krate.name, "sourcesIndex"), &dst);
-        all_sources.push(format!("sourcesIndex[\"{}\"] = {};",
-                                 &krate.name,
-                                 hierarchy.to_json_string()));
+        all_sources.push(format!(
+            "sourcesIndex[\"{}\"] = {};",
+            &krate.name,
+            hierarchy.to_json_string()
+        ));
         all_sources.sort();
-        let v = format!("var N = null;var sourcesIndex = {{}};\n{}\ncreateSourceSidebar();\n",
-                          all_sources.join("\n"));
+        let v = format!(
+            "var N = null;var sourcesIndex = {{}};\n{}\ncreateSourceSidebar();\n",
+            all_sources.join("\n")
+        );
         cx.shared.fs.write(&dst, v.as_bytes())?;
     }
 
@@ -907,19 +902,17 @@ themePicker.onblur = handleThemeButtonsBlur;
             krates.dedup();
 
             let content = format!(
-"<h1 class='fqn'>\
+                "<h1 class='fqn'>\
      <span class='in-band'>List of all crates</span>\
 </h1><ul class='mod'>{}</ul>",
-                                  krates
-                                    .iter()
-                                    .map(|s| {
-                                        format!("<li><a href=\"{}index.html\">{}</li>",
-                                                ensure_trailing_slash(s), s)
-                                    })
-                                    .collect::<String>());
-            let v = layout::render(&cx.shared.layout,
-                           &page, "", content,
-                           &cx.shared.themes);
+                krates
+                    .iter()
+                    .map(|s| {
+                        format!("<li><a href=\"{}index.html\">{}</li>", ensure_trailing_slash(s), s)
+                    })
+                    .collect::<String>()
+            );
+            let v = layout::render(&cx.shared.layout, &page, "", content, &cx.shared.themes);
             cx.shared.fs.write(&dst, v.as_bytes())?;
         }
     }
@@ -939,7 +932,7 @@ themePicker.onblur = handleThemeButtonsBlur;
             None => match cx.cache.external_paths.get(&did) {
                 Some(p) => p,
                 None => continue,
-            }
+            },
         };
 
         #[derive(Serialize)]
@@ -989,12 +982,10 @@ themePicker.onblur = handleThemeButtonsBlur;
             mydst.push(part);
         }
         cx.shared.ensure_dir(&mydst)?;
-        mydst.push(&format!("{}.{}.js",
-                            remote_item_type,
-                            remote_path[remote_path.len() - 1]));
+        mydst.push(&format!("{}.{}.js", remote_item_type, remote_path[remote_path.len() - 1]));
 
-        let (mut all_implementors, _) = try_err!(collect(&mydst, &krate.name, "implementors"),
-                                                 &mydst);
+        let (mut all_implementors, _) =
+            try_err!(collect(&mydst, &krate.name, "implementors"), &mydst);
         all_implementors.push(implementors);
         // Sort the implementors by crate so the file will be generated
         // identically even with rustdoc running in parallel.
@@ -1004,21 +995,27 @@ themePicker.onblur = handleThemeButtonsBlur;
         for implementor in &all_implementors {
             writeln!(v, "{}", *implementor).unwrap();
         }
-        v.push_str(r"
+        v.push_str(
+            r"
             if (window.register_implementors) {
                 window.register_implementors(implementors);
             } else {
                 window.pending_implementors = implementors;
             }
-        ");
+        ",
+        );
         v.push_str("})()");
         cx.shared.fs.write(&mydst, &v)?;
     }
     Ok(())
 }
 
-fn write_minify(fs:&DocFS, dst: PathBuf, contents: &str, enable_minification: bool
-                ) -> Result<(), Error> {
+fn write_minify(
+    fs: &DocFS,
+    dst: PathBuf,
+    contents: &str,
+    enable_minification: bool,
+) -> Result<(), Error> {
     if enable_minification {
         if dst.extension() == Some(&OsStr::new("css")) {
             let res = try_none!(minifier::css::minify(contents).ok(), &dst);
@@ -1042,10 +1039,7 @@ impl ItemEntry {
         while url.starts_with('/') {
             url.remove(0);
         }
-        ItemEntry {
-            url,
-            name,
-        }
+        ItemEntry { url, name }
     }
 }
 
@@ -1141,18 +1135,22 @@ fn print_entries(f: &mut Buffer, e: &FxHashSet<ItemEntry>, title: &str, class: &
     if !e.is_empty() {
         let mut e: Vec<&ItemEntry> = e.iter().collect();
         e.sort();
-        write!(f, "<h3 id='{}'>{}</h3><ul class='{} docblock'>{}</ul>",
-               title,
-               Escape(title),
-               class,
-               e.iter().map(|s| format!("<li>{}</li>", s.print())).collect::<String>());
+        write!(
+            f,
+            "<h3 id='{}'>{}</h3><ul class='{} docblock'>{}</ul>",
+            title,
+            Escape(title),
+            class,
+            e.iter().map(|s| format!("<li>{}</li>", s.print())).collect::<String>()
+        );
     }
 }
 
 impl AllTypes {
     fn print(self, f: &mut Buffer) {
-        write!(f,
-    "<h1 class='fqn'>\
+        write!(
+            f,
+            "<h1 class='fqn'>\
         <span class='out-of-band'>\
             <span id='render-detail'>\
                 <a id=\"toggle-all-docs\" href=\"javascript:void(0)\" title=\"collapse all docs\">\
@@ -1161,7 +1159,8 @@ impl AllTypes {
             </span>
         </span>
         <span class='in-band'>List of all items</span>\
-    </h1>");
+    </h1>"
+        );
         print_entries(f, &self.structs, "Structs", "structs");
         print_entries(f, &self.enums, "Enums", "enums");
         print_entries(f, &self.unions, "Unions", "unions");
@@ -1181,55 +1180,40 @@ impl AllTypes {
 
 #[derive(Debug)]
 enum Setting {
-    Section {
-        description: &'static str,
-        sub_settings: Vec<Setting>,
-    },
-    Entry {
-        js_data_name: &'static str,
-        description: &'static str,
-        default_value: bool,
-    }
+    Section { description: &'static str, sub_settings: Vec<Setting> },
+    Entry { js_data_name: &'static str, description: &'static str, default_value: bool },
 }
 
 impl Setting {
     fn display(&self) -> String {
         match *self {
-            Setting::Section { ref description, ref sub_settings } => {
-                format!(
-                    "<div class='setting-line'>\
+            Setting::Section { ref description, ref sub_settings } => format!(
+                "<div class='setting-line'>\
                         <div class='title'>{}</div>\
                         <div class='sub-settings'>{}</div>
                     </div>",
-                    description,
-                    sub_settings.iter().map(|s| s.display()).collect::<String>()
-                )
-            }
-            Setting::Entry { ref js_data_name, ref description, ref default_value } => {
-                format!(
-                    "<div class='setting-line'>\
+                description,
+                sub_settings.iter().map(|s| s.display()).collect::<String>()
+            ),
+            Setting::Entry { ref js_data_name, ref description, ref default_value } => format!(
+                "<div class='setting-line'>\
                         <label class='toggle'>\
                         <input type='checkbox' id='{}' {}>\
                         <span class='slider'></span>\
                         </label>\
                         <div>{}</div>\
                     </div>",
-                    js_data_name,
-                    if *default_value { " checked" } else { "" },
-                    description,
-                )
-            }
+                js_data_name,
+                if *default_value { " checked" } else { "" },
+                description,
+            ),
         }
     }
 }
 
 impl From<(&'static str, &'static str, bool)> for Setting {
     fn from(values: (&'static str, &'static str, bool)) -> Setting {
-        Setting::Entry {
-            js_data_name: values.0,
-            description: values.1,
-            default_value: values.2,
-        }
+        Setting::Entry { js_data_name: values.0, description: values.1, default_value: values.2 }
     }
 }
 
@@ -1245,31 +1229,36 @@ impl<T: Into<Setting>> From<(&'static str, Vec<T>)> for Setting {
 fn settings(root_path: &str, suffix: &str) -> String {
     // (id, explanation, default value)
     let settings: &[Setting] = &[
-        ("Auto-hide item declarations", vec![
-            ("auto-hide-struct", "Auto-hide structs declaration", true),
-            ("auto-hide-enum", "Auto-hide enums declaration", false),
-            ("auto-hide-union", "Auto-hide unions declaration", true),
-            ("auto-hide-trait", "Auto-hide traits declaration", true),
-            ("auto-hide-macro", "Auto-hide macros declaration", false),
-        ]).into(),
+        (
+            "Auto-hide item declarations",
+            vec![
+                ("auto-hide-struct", "Auto-hide structs declaration", true),
+                ("auto-hide-enum", "Auto-hide enums declaration", false),
+                ("auto-hide-union", "Auto-hide unions declaration", true),
+                ("auto-hide-trait", "Auto-hide traits declaration", true),
+                ("auto-hide-macro", "Auto-hide macros declaration", false),
+            ],
+        )
+            .into(),
         ("auto-hide-attributes", "Auto-hide item attributes.", true).into(),
         ("auto-hide-method-docs", "Auto-hide item methods' documentation", false).into(),
-        ("auto-hide-trait-implementations", "Auto-hide trait implementations documentation",
-            true).into(),
-        ("go-to-only-result", "Directly go to item in search if there is only one result",
-            false).into(),
+        ("auto-hide-trait-implementations", "Auto-hide trait implementations documentation", true)
+            .into(),
+        ("go-to-only-result", "Directly go to item in search if there is only one result", false)
+            .into(),
         ("line-numbers", "Show line numbers on code examples", false).into(),
         ("disable-shortcuts", "Disable keyboard shortcuts", false).into(),
     ];
     format!(
-"<h1 class='fqn'>\
+        "<h1 class='fqn'>\
     <span class='in-band'>Rustdoc settings</span>\
 </h1>\
 <div class='settings'>{}</div>\
 <script src='{}settings{}.js'></script>",
-            settings.iter().map(|s| s.display()).collect::<String>(),
-            root_path,
-            suffix)
+        settings.iter().map(|s| s.display()).collect::<String>(),
+        root_path,
+        suffix
+    )
 }
 
 impl Context {
@@ -1293,8 +1282,7 @@ impl Context {
             Some(i) => i,
             None => return Ok(()),
         };
-        let final_file = self.dst.join(&krate.name)
-                                 .join("all.html");
+        let final_file = self.dst.join(&krate.name).join("all.html");
         let settings_file = self.dst.join("settings.html");
 
         let crate_name = krate.name.clone();
@@ -1307,9 +1295,7 @@ impl Context {
             let mut work = vec![(self.clone(), item)];
 
             while let Some((mut cx, item)) = work.pop() {
-                cx.item(item, &mut all, |cx, item| {
-                    work.push((cx.clone(), item))
-                })?
+                cx.item(item, &mut all, |cx, item| work.push((cx.clone(), item)))?
             }
         }
 
@@ -1329,18 +1315,24 @@ impl Context {
             static_extra_scripts: &[],
         };
         let sidebar = if let Some(ref version) = self.cache.crate_version {
-            format!("<p class='location'>Crate {}</p>\
+            format!(
+                "<p class='location'>Crate {}</p>\
                      <div class='block version'>\
                          <p>Version {}</p>\
                      </div>\
                      <a id='all-types' href='index.html'><p>Back to index</p></a>",
-                    crate_name, version)
+                crate_name, version
+            )
         } else {
             String::new()
         };
-        let v = layout::render(&self.shared.layout,
-                       &page, sidebar, |buf: &mut Buffer| all.print(buf),
-                       &self.shared.themes);
+        let v = layout::render(
+            &self.shared.layout,
+            &page,
+            sidebar,
+            |buf: &mut Buffer| all.print(buf),
+            &self.shared.themes,
+        );
         self.shared.fs.write(&final_file, v.as_bytes())?;
 
         // Generating settings page.
@@ -1353,19 +1345,20 @@ impl Context {
         themes.push(PathBuf::from("settings.css"));
         let v = layout::render(
             &self.shared.layout,
-            &page, sidebar, settings(
+            &page,
+            sidebar,
+            settings(
                 self.shared.static_root_path.as_deref().unwrap_or("./"),
-                &self.shared.resource_suffix
+                &self.shared.resource_suffix,
             ),
-            &themes);
+            &themes,
+        );
         self.shared.fs.write(&settings_file, v.as_bytes())?;
 
         Ok(())
     }
 
-    fn render_item(&self,
-                   it: &clean::Item,
-                   pushname: bool) -> String {
+    fn render_item(&self, it: &clean::Item, pushname: bool) -> String {
         // A little unfortunate that this is done like this, but it sure
         // does make formatting *a lot* nicer.
         CURRENT_DEPTH.with(|slot| {
@@ -1387,11 +1380,14 @@ impl Context {
         title.push_str(" - Rust");
         let tyname = it.type_();
         let desc = if it.is_crate() {
-            format!("API documentation for the Rust `{}` crate.",
-                    self.shared.layout.krate)
+            format!("API documentation for the Rust `{}` crate.", self.shared.layout.krate)
         } else {
-            format!("API documentation for the Rust `{}` {} in crate `{}`.",
-                    it.name.as_ref().unwrap(), tyname, self.shared.layout.krate)
+            format!(
+                "API documentation for the Rust `{}` {} in crate `{}`.",
+                it.name.as_ref().unwrap(),
+                tyname,
+                self.shared.layout.krate
+            )
         };
         let keywords = make_item_keywords(it);
         let page = layout::Page {
@@ -1412,10 +1408,13 @@ impl Context {
         }
 
         if !self.render_redirect_pages {
-            layout::render(&self.shared.layout, &page,
-                           |buf: &mut _| print_sidebar(self, it, buf),
-                           |buf: &mut _| print_item(self, it, buf),
-                           &self.shared.themes)
+            layout::render(
+                &self.shared.layout,
+                &page,
+                |buf: &mut _| print_sidebar(self, it, buf),
+                |buf: &mut _| print_item(self, it, buf),
+                &self.shared.themes,
+            )
         } else {
             let mut url = self.root_path();
             if let Some(&(ref names, ty)) = self.cache.paths.get(&it.def_id) {
@@ -1437,7 +1436,8 @@ impl Context {
     ///
     /// The rendering driver uses this closure to queue up more work.
     fn item<F>(&mut self, item: clean::Item, all: &mut AllTypes, mut f: F) -> Result<(), Error>
-        where F: FnMut(&mut Context, clean::Item),
+    where
+        F: FnMut(&mut Context, clean::Item),
     {
         // Stripped modules survive the rustdoc passes (i.e., `strip-private`)
         // if they contain impls for public types. These modules can also
@@ -1473,9 +1473,8 @@ impl Context {
             }
 
             let m = match item.inner {
-                clean::StrippedItem(box clean::ModuleItem(m)) |
-                clean::ModuleItem(m) => m,
-                _ => unreachable!()
+                clean::StrippedItem(box clean::ModuleItem(m)) | clean::ModuleItem(m) => m,
+                _ => unreachable!(),
             };
 
             // Render sidebar-items.js used throughout this module.
@@ -1534,7 +1533,9 @@ impl Context {
         // BTreeMap instead of HashMap to get a sorted output
         let mut map: BTreeMap<_, Vec<_>> = BTreeMap::new();
         for item in &m.items {
-            if item.is_stripped() { continue }
+            if item.is_stripped() {
+                continue;
+            }
 
             let short = item.type_();
             let myname = match item.name {
@@ -1542,7 +1543,8 @@ impl Context {
                 Some(ref s) => s.to_string(),
             };
             let short = short.to_string();
-            map.entry(short).or_default()
+            map.entry(short)
+                .or_default()
                 .push((myname, Some(plain_summary_line(item.doc_value()))));
         }
 
@@ -1596,8 +1598,7 @@ impl Context {
                 path.push_str(&component.to_string_lossy());
                 path.push('/');
             });
-            let mut fname = file.file_name().expect("source has no filename")
-                                .to_os_string();
+            let mut fname = file.file_name().expect("source has no filename").to_os_string();
             fname.push(".html");
             path.push_str(&fname.to_string_lossy());
             (krate, &path)
@@ -1608,16 +1609,19 @@ impl Context {
         } else {
             format!("{}-{}", item.source.loline, item.source.hiline)
         };
-        Some(format!("{root}src/{krate}/{path}#{lines}",
-                     root = Escape(&root),
-                     krate = krate,
-                     path = path,
-                     lines = lines))
+        Some(format!(
+            "{root}src/{krate}/{path}#{lines}",
+            root = Escape(&root),
+            krate = krate,
+            path = path,
+            lines = lines
+        ))
     }
 }
 
 fn wrap_into_docblock<F>(w: &mut Buffer, f: F)
-    where F: FnOnce(&mut Buffer)
+where
+    F: FnOnce(&mut Buffer),
 {
     write!(w, "<div class=\"docblock type-decl hidden-by-usual-hider\">");
     f(w);
@@ -1629,16 +1633,21 @@ fn print_item(cx: &Context, item: &clean::Item, buf: &mut Buffer) {
     // Write the breadcrumb trail header for the top
     write!(buf, "<h1 class='fqn'><span class='out-of-band'>");
     if let Some(version) = item.stable_since() {
-        write!(buf, "<span class='since' title='Stable since Rust version {0}'>{0}</span>",
-                version);
+        write!(
+            buf,
+            "<span class='since' title='Stable since Rust version {0}'>{0}</span>",
+            version
+        );
     }
-    write!(buf,
-            "<span id='render-detail'>\
+    write!(
+        buf,
+        "<span id='render-detail'>\
                 <a id=\"toggle-all-docs\" href=\"javascript:void(0)\" \
                     title=\"collapse all docs\">\
                     [<span class='inner'>&#x2212;</span>]\
                 </a>\
-            </span>");
+            </span>"
+    );
 
     // Write `src` tag
     //
@@ -1648,19 +1657,20 @@ fn print_item(cx: &Context, item: &clean::Item, buf: &mut Buffer) {
     // used to find the link to auto-click.
     if cx.shared.include_sources && !item.is_primitive() {
         if let Some(l) = cx.src_href(item) {
-            write!(buf, "<a class='srclink' href='{}' title='{}'>[src]</a>",
-                    l, "goto source code");
+            write!(buf, "<a class='srclink' href='{}' title='{}'>[src]</a>", l, "goto source code");
         }
     }
 
     write!(buf, "</span>"); // out-of-band
     write!(buf, "<span class='in-band'>");
     let name = match item.inner {
-        clean::ModuleItem(ref m) => if m.is_crate {
+        clean::ModuleItem(ref m) => {
+            if m.is_crate {
                 "Crate "
             } else {
                 "Module "
-            },
+            }
+        }
         clean::FunctionItem(..) | clean::ForeignFunctionItem(..) => "Function ",
         clean::TraitItem(..) => "Trait ",
         clean::StructItem(..) => "Struct ",
@@ -1672,7 +1682,7 @@ fn print_item(cx: &Context, item: &clean::Item, buf: &mut Buffer) {
             MacroKind::Bang => "Macro ",
             MacroKind::Attr => "Attribute Macro ",
             MacroKind::Derive => "Derive Macro ",
-        }
+        },
         clean::PrimitiveItem(..) => "Primitive Type ",
         clean::StaticItem(..) | clean::ForeignStaticItem(..) => "Static ",
         clean::ConstantItem(..) => "Constant ",
@@ -1690,21 +1700,23 @@ fn print_item(cx: &Context, item: &clean::Item, buf: &mut Buffer) {
         let cur = &cx.current;
         let amt = if item.is_mod() { cur.len() - 1 } else { cur.len() };
         for (i, component) in cur.iter().enumerate().take(amt) {
-            write!(buf, "<a href='{}index.html'>{}</a>::<wbr>",
-                    "../".repeat(cur.len() - i - 1),
-                    component);
+            write!(
+                buf,
+                "<a href='{}index.html'>{}</a>::<wbr>",
+                "../".repeat(cur.len() - i - 1),
+                component
+            );
         }
     }
-    write!(buf, "<a class=\"{}\" href=''>{}</a>",
-            item.type_(), item.name.as_ref().unwrap());
+    write!(buf, "<a class=\"{}\" href=''>{}</a>", item.type_(), item.name.as_ref().unwrap());
 
     write!(buf, "</span></h1>"); // in-band
 
     match item.inner {
-        clean::ModuleItem(ref m) =>
-            item_module(buf, cx, item, &m.items),
-        clean::FunctionItem(ref f) | clean::ForeignFunctionItem(ref f) =>
-            item_function(buf, cx, item, f),
+        clean::ModuleItem(ref m) => item_module(buf, cx, item, &m.items),
+        clean::FunctionItem(ref f) | clean::ForeignFunctionItem(ref f) => {
+            item_function(buf, cx, item, f)
+        }
         clean::TraitItem(ref t) => item_trait(buf, cx, item, t),
         clean::StructItem(ref s) => item_struct(buf, cx, item, s),
         clean::UnionItem(ref s) => item_union(buf, cx, item, s),
@@ -1713,8 +1725,7 @@ fn print_item(cx: &Context, item: &clean::Item, buf: &mut Buffer) {
         clean::MacroItem(ref m) => item_macro(buf, cx, item, m),
         clean::ProcMacroItem(ref m) => item_proc_macro(buf, cx, item, m),
         clean::PrimitiveItem(_) => item_primitive(buf, cx, item),
-        clean::StaticItem(ref i) | clean::ForeignStaticItem(ref i) =>
-            item_static(buf, cx, item, i),
+        clean::StaticItem(ref i) | clean::ForeignStaticItem(ref i) => item_static(buf, cx, item, i),
         clean::ConstantItem(ref c) => item_constant(buf, cx, item, c),
         clean::ForeignTypeItem => item_foreign_type(buf, cx, item),
         clean::KeywordItem(_) => item_keyword(buf, cx, item),
@@ -1745,7 +1756,8 @@ fn full_path(cx: &Context, item: &clean::Item) -> String {
 fn plain_summary_line(s: Option<&str>) -> String {
     let s = s.unwrap_or("");
     // This essentially gets the first paragraph of text in one line.
-    let mut line = s.lines()
+    let mut line = s
+        .lines()
         .skip_while(|line| line.chars().all(|c| c.is_whitespace()))
         .take_while(|line| line.chars().any(|c| !c.is_whitespace()))
         .fold(String::new(), |mut acc, line| {
@@ -1761,14 +1773,15 @@ fn plain_summary_line(s: Option<&str>) -> String {
 fn shorten(s: String) -> String {
     if s.chars().count() > 60 {
         let mut len = 0;
-        let mut ret = s.split_whitespace()
-                        .take_while(|p| {
-                            // + 1 for the added character after the word.
-                            len += p.chars().count() + 1;
-                            len < 60
-                        })
-                        .collect::<Vec<_>>()
-                        .join(" ");
+        let mut ret = s
+            .split_whitespace()
+            .take_while(|p| {
+                // + 1 for the added character after the word.
+                len += p.chars().count() + 1;
+                len < 60
+            })
+            .collect::<Vec<_>>()
+            .join(" ");
         ret.push('…');
         ret
     } else {
@@ -1794,11 +1807,21 @@ fn render_markdown(
     is_hidden: bool,
 ) {
     let mut ids = cx.id_map.borrow_mut();
-    write!(w, "<div class='docblock{}'>{}{}</div>",
-           if is_hidden { " hidden" } else { "" },
-           prefix,
-           Markdown(md_text, &links, &mut ids,
-           cx.shared.codes, cx.shared.edition, &cx.shared.playground).to_string())
+    write!(
+        w,
+        "<div class='docblock{}'>{}{}</div>",
+        if is_hidden { " hidden" } else { "" },
+        prefix,
+        Markdown(
+            md_text,
+            &links,
+            &mut ids,
+            cx.shared.codes,
+            cx.shared.edition,
+            &cx.shared.playground
+        )
+        .to_string()
+    )
 }
 
 fn document_short(
@@ -1811,16 +1834,22 @@ fn document_short(
 ) {
     if let Some(s) = item.doc_value() {
         let markdown = if s.contains('\n') {
-            format!("{} [Read more]({})",
-                    &plain_summary_line(Some(s)), naive_assoc_href(item, link))
+            format!(
+                "{} [Read more]({})",
+                &plain_summary_line(Some(s)),
+                naive_assoc_href(item, link)
+            )
         } else {
             plain_summary_line(Some(s))
         };
         render_markdown(w, cx, &markdown, item.links(), prefix, is_hidden);
     } else if !prefix.is_empty() {
-        write!(w, "<div class='docblock{}'>{}</div>",
-               if is_hidden { " hidden" } else { "" },
-               prefix);
+        write!(
+            w,
+            "<div class='docblock{}'>{}</div>",
+            if is_hidden { " hidden" } else { "" },
+            prefix
+        );
     }
 }
 
@@ -1829,9 +1858,12 @@ fn document_full(w: &mut Buffer, item: &clean::Item, cx: &Context, prefix: &str,
         debug!("Doc block: =====\n{}\n=====", s);
         render_markdown(w, cx, &*s, item.links(), prefix, is_hidden);
     } else if !prefix.is_empty() {
-        write!(w, "<div class='docblock{}'>{}</div>",
-               if is_hidden { " hidden" } else { "" },
-               prefix);
+        write!(
+            w,
+            "<div class='docblock{}'>{}</div>",
+            if is_hidden { " hidden" } else { "" },
+            prefix
+        );
     }
 }
 
@@ -1865,22 +1897,34 @@ fn document_non_exhaustive(w: &mut Buffer, item: &clean::Item) {
         });
 
         if item.is_struct() {
-            write!(w, "Non-exhaustive structs could have additional fields added in future. \
+            write!(
+                w,
+                "Non-exhaustive structs could have additional fields added in future. \
                        Therefore, non-exhaustive structs cannot be constructed in external crates \
                        using the traditional <code>Struct {{ .. }}</code> syntax; cannot be \
                        matched against without a wildcard <code>..</code>; and \
-                       struct update syntax will not work.");
+                       struct update syntax will not work."
+            );
         } else if item.is_enum() {
-            write!(w, "Non-exhaustive enums could have additional variants added in future. \
+            write!(
+                w,
+                "Non-exhaustive enums could have additional variants added in future. \
                        Therefore, when matching against variants of non-exhaustive enums, an \
-                       extra wildcard arm must be added to account for any future variants.");
+                       extra wildcard arm must be added to account for any future variants."
+            );
         } else if item.is_variant() {
-            write!(w, "Non-exhaustive enum variants could have additional fields added in future. \
+            write!(
+                w,
+                "Non-exhaustive enum variants could have additional fields added in future. \
                        Therefore, non-exhaustive enum variants cannot be constructed in external \
-                       crates and cannot be matched against.");
+                       crates and cannot be matched against."
+            );
         } else {
-            write!(w, "This type will require a wildcard arm in any match statements or \
-                       constructors.");
+            write!(
+                w,
+                "This type will require a wildcard arm in any match statements or \
+                       constructors."
+            );
         }
 
         write!(w, "</div>");
@@ -1888,12 +1932,10 @@ fn document_non_exhaustive(w: &mut Buffer, item: &clean::Item) {
 }
 
 fn name_key(name: &str) -> (&str, u64, usize) {
-    let end = name.bytes()
-        .rposition(|b| b.is_ascii_digit()).map_or(name.len(), |i| i + 1);
+    let end = name.bytes().rposition(|b| b.is_ascii_digit()).map_or(name.len(), |i| i + 1);
 
     // find number at end
-    let split = name[0..end].bytes()
-        .rposition(|b| !b.is_ascii_digit()).map_or(0, |i| i + 1);
+    let split = name[0..end].bytes().rposition(|b| !b.is_ascii_digit()).map_or(0, |i| i + 1);
 
     // count leading zeroes
     let after_zeroes =
@@ -1916,20 +1958,20 @@ fn item_module(w: &mut Buffer, cx: &Context, item: &clean::Item, items: &[clean:
     // the order of item types in the listing
     fn reorder(ty: ItemType) -> u8 {
         match ty {
-            ItemType::ExternCrate     => 0,
-            ItemType::Import          => 1,
-            ItemType::Primitive       => 2,
-            ItemType::Module          => 3,
-            ItemType::Macro           => 4,
-            ItemType::Struct          => 5,
-            ItemType::Enum            => 6,
-            ItemType::Constant        => 7,
-            ItemType::Static          => 8,
-            ItemType::Trait           => 9,
-            ItemType::Function        => 10,
-            ItemType::Typedef         => 12,
-            ItemType::Union           => 13,
-            _                         => 14 + ty as u8,
+            ItemType::ExternCrate => 0,
+            ItemType::Import => 1,
+            ItemType::Primitive => 2,
+            ItemType::Module => 3,
+            ItemType::Macro => 4,
+            ItemType::Struct => 5,
+            ItemType::Enum => 6,
+            ItemType::Constant => 7,
+            ItemType::Static => 8,
+            ItemType::Trait => 9,
+            ItemType::Function => 10,
+            ItemType::Typedef => 12,
+            ItemType::Union => 13,
+            _ => 14 + ty as u8,
         }
     }
 
@@ -1937,7 +1979,7 @@ fn item_module(w: &mut Buffer, cx: &Context, item: &clean::Item, items: &[clean:
         let ty1 = i1.type_();
         let ty2 = i2.type_();
         if ty1 != ty2 {
-            return (reorder(ty1), idx1).cmp(&(reorder(ty2), idx2))
+            return (reorder(ty1), idx1).cmp(&(reorder(ty2), idx2));
         }
         let s1 = i1.stability.as_ref().map(|s| s.level);
         let s2 = i2.stability.as_ref().map(|s| s.level);
@@ -1973,18 +2015,14 @@ fn item_module(w: &mut Buffer, cx: &Context, item: &clean::Item, items: &[clean:
     // can be identical even if the elements are different (mostly in imports).
     // So in case this is an import, we keep everything by adding a "unique id"
     // (which is the position in the vector).
-    indices.dedup_by_key(|i| (items[*i].def_id,
-                              if items[*i].name.as_ref().is_some() {
-                                  Some(full_path(cx, &items[*i]))
-                              } else {
-                                  None
-                              },
-                              items[*i].type_(),
-                              if items[*i].is_import() {
-                                  *i
-                              } else {
-                                  0
-                              }));
+    indices.dedup_by_key(|i| {
+        (
+            items[*i].def_id,
+            if items[*i].name.as_ref().is_some() { Some(full_path(cx, &items[*i])) } else { None },
+            items[*i].type_(),
+            if items[*i].is_import() { *i } else { 0 },
+        )
+    });
 
     debug!("{:?}", indices);
     let mut curty = None;
@@ -2004,9 +2042,13 @@ fn item_module(w: &mut Buffer, cx: &Context, item: &clean::Item, items: &[clean:
             }
             curty = myty;
             let (short, name) = item_ty_to_strs(&myty.unwrap());
-            write!(w, "<h2 id='{id}' class='section-header'>\
+            write!(
+                w,
+                "<h2 id='{id}' class='section-header'>\
                        <a href=\"#{id}\">{name}</a></h2>\n<table>",
-                   id = cx.derive_id(short.to_owned()), name = name);
+                id = cx.derive_id(short.to_owned()),
+                name = name
+            );
         }
 
         match myitem.inner {
@@ -2014,69 +2056,72 @@ fn item_module(w: &mut Buffer, cx: &Context, item: &clean::Item, items: &[clean:
                 use crate::html::format::anchor;
 
                 match *src {
-                    Some(ref src) => {
-                        write!(w, "<tr><td><code>{}extern crate {} as {};",
-                               myitem.visibility.print_with_space(),
-                               anchor(myitem.def_id, src),
-                               name)
-                    }
-                    None => {
-                        write!(w, "<tr><td><code>{}extern crate {};",
-                               myitem.visibility.print_with_space(),
-                               anchor(myitem.def_id, name))
-                    }
+                    Some(ref src) => write!(
+                        w,
+                        "<tr><td><code>{}extern crate {} as {};",
+                        myitem.visibility.print_with_space(),
+                        anchor(myitem.def_id, src),
+                        name
+                    ),
+                    None => write!(
+                        w,
+                        "<tr><td><code>{}extern crate {};",
+                        myitem.visibility.print_with_space(),
+                        anchor(myitem.def_id, name)
+                    ),
                 }
                 write!(w, "</code></td></tr>");
             }
 
             clean::ImportItem(ref import) => {
-                write!(w, "<tr><td><code>{}{}</code></td></tr>",
-                       myitem.visibility.print_with_space(), import.print());
+                write!(
+                    w,
+                    "<tr><td><code>{}{}</code></td></tr>",
+                    myitem.visibility.print_with_space(),
+                    import.print()
+                );
             }
 
             _ => {
-                if myitem.name.is_none() { continue }
+                if myitem.name.is_none() {
+                    continue;
+                }
 
                 let unsafety_flag = match myitem.inner {
                     clean::FunctionItem(ref func) | clean::ForeignFunctionItem(ref func)
-                    if func.header.unsafety == hir::Unsafety::Unsafe => {
+                        if func.header.unsafety == hir::Unsafety::Unsafe =>
+                    {
                         "<a title='unsafe function' href='#'><sup>âš </sup></a>"
                     }
                     _ => "",
                 };
 
                 let stab = myitem.stability_class();
-                let add = if stab.is_some() {
-                    " "
-                } else {
-                    ""
-                };
+                let add = if stab.is_some() { " " } else { "" };
 
                 let doc_value = myitem.doc_value().unwrap_or("");
-                write!(w, "\
+                write!(
+                    w,
+                    "\
                        <tr class='{stab}{add}module-item'>\
                            <td><a class=\"{class}\" href=\"{href}\" \
                                   title='{title}'>{name}</a>{unsafety_flag}</td>\
                            <td class='docblock-short'>{stab_tags}{docs}</td>\
                        </tr>",
-                       name = *myitem.name.as_ref().unwrap(),
-                       stab_tags = stability_tags(myitem),
-                       docs = MarkdownSummaryLine(doc_value, &myitem.links()).to_string(),
-                       class = myitem.type_(),
-                       add = add,
-                       stab = stab.unwrap_or_else(|| String::new()),
-                       unsafety_flag = unsafety_flag,
-                       href = item_path(myitem.type_(), myitem.name.as_ref().unwrap()),
-                       title = [full_path(cx, myitem), myitem.type_().to_string()]
-                                .iter()
-                                .filter_map(|s| if !s.is_empty() {
-                                    Some(s.as_str())
-                                } else {
-                                    None
-                                })
-                                .collect::<Vec<_>>()
-                                .join(" "),
-                      );
+                    name = *myitem.name.as_ref().unwrap(),
+                    stab_tags = stability_tags(myitem),
+                    docs = MarkdownSummaryLine(doc_value, &myitem.links()).to_string(),
+                    class = myitem.type_(),
+                    add = add,
+                    stab = stab.unwrap_or_else(|| String::new()),
+                    unsafety_flag = unsafety_flag,
+                    href = item_path(myitem.type_(), myitem.name.as_ref().unwrap()),
+                    title = [full_path(cx, myitem), myitem.type_().to_string()]
+                        .iter()
+                        .filter_map(|s| if !s.is_empty() { Some(s.as_str()) } else { None })
+                        .collect::<Vec<_>>()
+                        .join(" "),
+                );
             }
         }
     }
@@ -2110,11 +2155,7 @@ fn stability_tags(item: &clean::Item) -> String {
         tags += &tag_html("deprecated", message);
     }
 
-    if let Some(stab) = item
-        .stability
-        .as_ref()
-        .filter(|s| s.level == stability::Unstable)
-    {
+    if let Some(stab) = item.stability.as_ref().filter(|s| s.level == stability::Unstable) {
         if stab.feature.as_ref().map(|s| &**s) == Some("rustc_private") {
             tags += &tag_html("internal", "Internal");
         } else {
@@ -2156,17 +2197,18 @@ fn short_stability(item: &clean::Item, cx: &Context) -> Vec<String> {
         if let Some(note) = note {
             let mut ids = cx.id_map.borrow_mut();
             let html = MarkdownHtml(
-                &note, &mut ids, error_codes, cx.shared.edition, &cx.shared.playground);
+                &note,
+                &mut ids,
+                error_codes,
+                cx.shared.edition,
+                &cx.shared.playground,
+            );
             message.push_str(&format!(": {}", html.to_string()));
         }
         stability.push(format!("<div class='stab deprecated'>{}</div>", message));
     }
 
-    if let Some(stab) = item
-        .stability
-        .as_ref()
-        .filter(|stab| stab.level == stability::Unstable)
-    {
+    if let Some(stab) = item.stability.as_ref().filter(|stab| stab.level == stability::Unstable) {
         let is_rustc_private = stab.feature.as_ref().map(|s| &**s) == Some("rustc_private");
 
         let mut message = if is_rustc_private {
@@ -2211,23 +2253,17 @@ fn short_stability(item: &clean::Item, cx: &Context) -> Vec<String> {
                     error_codes,
                     cx.shared.edition,
                     &cx.shared.playground,
-                ).to_string()
+                )
+                .to_string()
             );
         }
 
-        let class = if is_rustc_private {
-            "internal"
-        } else {
-            "unstable"
-        };
+        let class = if is_rustc_private { "internal" } else { "unstable" };
         stability.push(format!("<div class='stab {}'>{}</div>", class, message));
     }
 
     if let Some(ref cfg) = item.attrs.cfg {
-        stability.push(format!(
-            "<div class='stab portability'>{}</div>",
-            cfg.render_long_html()
-        ));
+        stability.push(format!("<div class='stab portability'>{}</div>", cfg.render_long_html()));
     }
 
     stability
@@ -2236,23 +2272,29 @@ fn short_stability(item: &clean::Item, cx: &Context) -> Vec<String> {
 fn item_constant(w: &mut Buffer, cx: &Context, it: &clean::Item, c: &clean::Constant) {
     write!(w, "<pre class='rust const'>");
     render_attributes(w, it, false);
-    write!(w, "{vis}const \
+    write!(
+        w,
+        "{vis}const \
                {name}: {typ}</pre>",
-           vis = it.visibility.print_with_space(),
-           name = it.name.as_ref().unwrap(),
-           typ = c.type_.print());
+        vis = it.visibility.print_with_space(),
+        name = it.name.as_ref().unwrap(),
+        typ = c.type_.print()
+    );
     document(w, cx, it)
 }
 
 fn item_static(w: &mut Buffer, cx: &Context, it: &clean::Item, s: &clean::Static) {
     write!(w, "<pre class='rust static'>");
     render_attributes(w, it, false);
-    write!(w, "{vis}static {mutability}\
+    write!(
+        w,
+        "{vis}static {mutability}\
                {name}: {typ}</pre>",
-           vis = it.visibility.print_with_space(),
-           mutability = s.mutability.print_with_space(),
-           name = it.name.as_ref().unwrap(),
-           typ = s.type_.print());
+        vis = it.visibility.print_with_space(),
+        mutability = s.mutability.print_with_space(),
+        name = it.name.as_ref().unwrap(),
+        typ = s.type_.print()
+    );
     document(w, cx, it)
 }
 
@@ -2266,60 +2308,77 @@ fn item_function(w: &mut Buffer, cx: &Context, it: &clean::Item, f: &clean::Func
         print_abi_with_space(f.header.abi),
         it.name.as_ref().unwrap(),
         f.generics.print()
-    ).len();
+    )
+    .len();
     write!(w, "{}<pre class='rust fn'>", render_spotlight_traits(it));
     render_attributes(w, it, false);
-    write!(w,
-           "{vis}{constness}{unsafety}{asyncness}{abi}fn \
+    write!(
+        w,
+        "{vis}{constness}{unsafety}{asyncness}{abi}fn \
            {name}{generics}{decl}{where_clause}</pre>",
-           vis = it.visibility.print_with_space(),
-           constness = f.header.constness.print_with_space(),
-           unsafety = f.header.unsafety.print_with_space(),
-           asyncness = f.header.asyncness.print_with_space(),
-           abi = print_abi_with_space(f.header.abi),
-           name = it.name.as_ref().unwrap(),
-           generics = f.generics.print(),
-           where_clause = WhereClause { gens: &f.generics, indent: 0, end_newline: true },
-           decl = Function {
-              decl: &f.decl,
-              header_len,
-              indent: 0,
-              asyncness: f.header.asyncness,
-           }.print());
+        vis = it.visibility.print_with_space(),
+        constness = f.header.constness.print_with_space(),
+        unsafety = f.header.unsafety.print_with_space(),
+        asyncness = f.header.asyncness.print_with_space(),
+        abi = print_abi_with_space(f.header.abi),
+        name = it.name.as_ref().unwrap(),
+        generics = f.generics.print(),
+        where_clause = WhereClause { gens: &f.generics, indent: 0, end_newline: true },
+        decl = Function { decl: &f.decl, header_len, indent: 0, asyncness: f.header.asyncness }
+            .print()
+    );
     document(w, cx, it)
 }
 
-fn render_implementor(cx: &Context, implementor: &Impl, w: &mut Buffer,
-                      implementor_dups: &FxHashMap<&str, (DefId, bool)>) {
+fn render_implementor(
+    cx: &Context,
+    implementor: &Impl,
+    w: &mut Buffer,
+    implementor_dups: &FxHashMap<&str, (DefId, bool)>,
+) {
     // If there's already another implementor that has the same abbridged name, use the
     // full path, for example in `std::iter::ExactSizeIterator`
     let use_absolute = match implementor.inner_impl().for_ {
-        clean::ResolvedPath { ref path, is_generic: false, .. } |
-        clean::BorrowedRef {
+        clean::ResolvedPath { ref path, is_generic: false, .. }
+        | clean::BorrowedRef {
             type_: box clean::ResolvedPath { ref path, is_generic: false, .. },
             ..
         } => implementor_dups[path.last_name()].1,
         _ => false,
     };
-    render_impl(w, cx, implementor, AssocItemLink::Anchor(None), RenderMode::Normal,
-                implementor.impl_item.stable_since(), false, Some(use_absolute), false, false);
+    render_impl(
+        w,
+        cx,
+        implementor,
+        AssocItemLink::Anchor(None),
+        RenderMode::Normal,
+        implementor.impl_item.stable_since(),
+        false,
+        Some(use_absolute),
+        false,
+        false,
+    );
 }
 
-fn render_impls(cx: &Context, w: &mut Buffer,
-                traits: &[&&Impl],
-                containing_item: &clean::Item) {
-    let mut impls = traits.iter()
+fn render_impls(cx: &Context, w: &mut Buffer, traits: &[&&Impl], containing_item: &clean::Item) {
+    let mut impls = traits
+        .iter()
         .map(|i| {
             let did = i.trait_did().unwrap();
             let assoc_link = AssocItemLink::GotoSource(did, &i.inner_impl().provided_trait_methods);
-            let mut buffer = if w.is_for_html() {
-                Buffer::html()
-            } else {
-                Buffer::new()
-            };
-            render_impl(&mut buffer, cx, i, assoc_link,
-                        RenderMode::Normal, containing_item.stable_since(),
-                        true, None, false, true);
+            let mut buffer = if w.is_for_html() { Buffer::html() } else { Buffer::new() };
+            render_impl(
+                &mut buffer,
+                cx,
+                i,
+                assoc_link,
+                RenderMode::Normal,
+                containing_item.stable_since(),
+                true,
+                None,
+                false,
+                true,
+            );
             buffer.into_inner()
         })
         .collect::<Vec<_>>();
@@ -2351,12 +2410,7 @@ fn compare_impl<'a, 'b>(lhs: &'a &&Impl, rhs: &'b &&Impl) -> Ordering {
     name_key(&lhs).cmp(&name_key(&rhs))
 }
 
-fn item_trait(
-    w: &mut Buffer,
-    cx: &Context,
-    it: &clean::Item,
-    t: &clean::Trait,
-) {
+fn item_trait(w: &mut Buffer, cx: &Context, it: &clean::Item, t: &clean::Trait) {
     let bounds = bounds(&t.bounds, false);
     let types = t.items.iter().filter(|m| m.is_associated_type()).collect::<Vec<_>>();
     let consts = t.items.iter().filter(|m| m.is_associated_const()).collect::<Vec<_>>();
@@ -2367,13 +2421,16 @@ fn item_trait(
     wrap_into_docblock(w, |w| {
         write!(w, "<pre class='rust trait'>");
         render_attributes(w, it, true);
-        write!(w, "{}{}{}trait {}{}{}",
-               it.visibility.print_with_space(),
-               t.unsafety.print_with_space(),
-               if t.is_auto { "auto " } else { "" },
-               it.name.as_ref().unwrap(),
-               t.generics.print(),
-               bounds);
+        write!(
+            w,
+            "{}{}{}trait {}{}{}",
+            it.visibility.print_with_space(),
+            t.unsafety.print_with_space(),
+            if t.is_auto { "auto " } else { "" },
+            it.name.as_ref().unwrap(),
+            t.generics.print(),
+            bounds
+        );
 
         if !t.generics.where_predicates.is_empty() {
             write!(w, "{}", WhereClause { gens: &t.generics, indent: 0, end_newline: true });
@@ -2405,7 +2462,7 @@ fn item_trait(
                 write!(w, ";\n");
 
                 if pos < required.len() - 1 {
-                   write!(w, "<div class='item-spacer'></div>");
+                    write!(w, "<div class='item-spacer'></div>");
                 }
             }
             if !required.is_empty() && !provided.is_empty() {
@@ -2416,13 +2473,13 @@ fn item_trait(
                 match m.inner {
                     clean::MethodItem(ref inner) if !inner.generics.where_predicates.is_empty() => {
                         write!(w, ",\n    {{ ... }}\n");
-                    },
+                    }
                     _ => {
                         write!(w, " {{ ... }}\n");
-                    },
+                    }
                 }
                 if pos < provided.len() - 1 {
-                   write!(w, "<div class='item-spacer'></div>");
+                    write!(w, "<div class='item-spacer'></div>");
                 }
             }
             write!(w, "}}");
@@ -2433,16 +2490,15 @@ fn item_trait(
     // Trait documentation
     document(w, cx, it);
 
-    fn write_small_section_header(
-        w: &mut Buffer,
-        id: &str,
-        title: &str,
-        extra_content: &str,
-    ) {
-        write!(w, "
+    fn write_small_section_header(w: &mut Buffer, id: &str, title: &str, extra_content: &str) {
+        write!(
+            w,
+            "
             <h2 id='{0}' class='small-section-header'>\
               {1}<a href='#{0}' class='anchor'></a>\
-            </h2>{2}", id, title, extra_content)
+            </h2>{2}",
+            id, title, extra_content
+        )
     }
 
     fn write_loading_content(w: &mut Buffer, extra_content: &str) {
@@ -2454,10 +2510,13 @@ fn item_trait(
         let item_type = m.type_();
         let id = cx.derive_id(format!("{}.{}", item_type, name));
         let ns_id = cx.derive_id(format!("{}.{}", name, item_type.name_space()));
-        write!(w, "<h3 id='{id}' class='method'>{extra}<code id='{ns_id}'>",
-               extra = render_spotlight_traits(m),
-               id = id,
-               ns_id = ns_id);
+        write!(
+            w,
+            "<h3 id='{id}' class='method'>{extra}<code id='{ns_id}'>",
+            extra = render_spotlight_traits(m),
+            id = id,
+            ns_id = ns_id
+        );
         render_assoc_item(w, m, AssocItemLink::Anchor(Some(&id)), ItemType::Impl);
         write!(w, "</code>");
         render_stability_since(w, m, t);
@@ -2466,8 +2525,12 @@ fn item_trait(
     }
 
     if !types.is_empty() {
-        write_small_section_header(w, "associated-types", "Associated Types",
-                                   "<div class='methods'>");
+        write_small_section_header(
+            w,
+            "associated-types",
+            "Associated Types",
+            "<div class='methods'>",
+        );
         for t in &types {
             trait_item(w, cx, *t, it);
         }
@@ -2475,8 +2538,12 @@ fn item_trait(
     }
 
     if !consts.is_empty() {
-        write_small_section_header(w, "associated-const", "Associated Constants",
-                                   "<div class='methods'>");
+        write_small_section_header(
+            w,
+            "associated-const",
+            "Associated Constants",
+            "<div class='methods'>",
+        );
         for t in &consts {
             trait_item(w, cx, *t, it);
         }
@@ -2485,16 +2552,24 @@ fn item_trait(
 
     // Output the documentation for each function individually
     if !required.is_empty() {
-        write_small_section_header(w, "required-methods", "Required methods",
-                                   "<div class='methods'>");
+        write_small_section_header(
+            w,
+            "required-methods",
+            "Required methods",
+            "<div class='methods'>",
+        );
         for m in &required {
             trait_item(w, cx, *m, it);
         }
         write_loading_content(w, "</div>");
     }
     if !provided.is_empty() {
-        write_small_section_header(w, "provided-methods", "Provided methods",
-                                   "<div class='methods'>");
+        write_small_section_header(
+            w,
+            "provided-methods",
+            "Provided methods",
+            "<div class='methods'>",
+        );
         for m in &provided {
             trait_item(w, cx, *m, it);
         }
@@ -2512,8 +2587,8 @@ fn item_trait(
         let mut implementor_dups: FxHashMap<&str, (DefId, bool)> = FxHashMap::default();
         for implementor in implementors {
             match implementor.inner_impl().for_ {
-                clean::ResolvedPath { ref path, did, is_generic: false, .. } |
-                clean::BorrowedRef {
+                clean::ResolvedPath { ref path, did, is_generic: false, .. }
+                | clean::BorrowedRef {
                     type_: box clean::ResolvedPath { ref path, did, is_generic: false, .. },
                     ..
                 } => {
@@ -2527,13 +2602,12 @@ fn item_trait(
             }
         }
 
-        let (local, foreign) = implementors.iter()
-            .partition::<Vec<_>, _>(|i| i.inner_impl().for_.def_id()
-                                         .map_or(true, |d| cx.cache.paths.contains_key(&d)));
-
+        let (local, foreign) = implementors.iter().partition::<Vec<_>, _>(|i| {
+            i.inner_impl().for_.def_id().map_or(true, |d| cx.cache.paths.contains_key(&d))
+        });
 
-        let (mut synthetic, mut concrete): (Vec<&&Impl>, Vec<&&Impl>) = local.iter()
-            .partition(|i| i.inner_impl().synthetic);
+        let (mut synthetic, mut concrete): (Vec<&&Impl>, Vec<&&Impl>) =
+            local.iter().partition(|i| i.inner_impl().synthetic);
 
         synthetic.sort_by(compare_impl);
         concrete.sort_by(compare_impl);
@@ -2544,29 +2618,45 @@ fn item_trait(
             for implementor in foreign {
                 let assoc_link = AssocItemLink::GotoSource(
                     implementor.impl_item.def_id,
-                    &implementor.inner_impl().provided_trait_methods
+                    &implementor.inner_impl().provided_trait_methods,
+                );
+                render_impl(
+                    w,
+                    cx,
+                    &implementor,
+                    assoc_link,
+                    RenderMode::Normal,
+                    implementor.impl_item.stable_since(),
+                    false,
+                    None,
+                    true,
+                    false,
                 );
-                render_impl(w, cx, &implementor, assoc_link,
-                            RenderMode::Normal, implementor.impl_item.stable_since(), false,
-                            None, true, false);
             }
             write_loading_content(w, "");
         }
 
-        write_small_section_header(w, "implementors", "Implementors",
-                                   "<div class='item-list' id='implementors-list'>");
+        write_small_section_header(
+            w,
+            "implementors",
+            "Implementors",
+            "<div class='item-list' id='implementors-list'>",
+        );
         for implementor in concrete {
             render_implementor(cx, implementor, w, &implementor_dups);
         }
         write_loading_content(w, "</div>");
 
         if t.auto {
-            write_small_section_header(w, "synthetic-implementors", "Auto implementors",
-                                       "<div class='item-list' id='synthetic-implementors-list'>");
+            write_small_section_header(
+                w,
+                "synthetic-implementors",
+                "Auto implementors",
+                "<div class='item-list' id='synthetic-implementors-list'>",
+            );
             for implementor in synthetic {
-                synthetic_types.extend(
-                    collect_paths_for_type(implementor.inner_impl().for_.clone())
-                );
+                synthetic_types
+                    .extend(collect_paths_for_type(implementor.inner_impl().for_.clone()));
                 render_implementor(cx, implementor, w, &implementor_dups);
             }
             write_loading_content(w, "</div>");
@@ -2574,13 +2664,21 @@ fn item_trait(
     } else {
         // even without any implementations to write in, we still want the heading and list, so the
         // implementors javascript file pulled in below has somewhere to write the impls into
-        write_small_section_header(w, "implementors", "Implementors",
-                                   "<div class='item-list' id='implementors-list'>");
+        write_small_section_header(
+            w,
+            "implementors",
+            "Implementors",
+            "<div class='item-list' id='implementors-list'>",
+        );
         write_loading_content(w, "</div>");
 
         if t.auto {
-            write_small_section_header(w, "synthetic-implementors", "Auto implementors",
-                                       "<div class='item-list' id='synthetic-implementors-list'>");
+            write_small_section_header(
+                w,
+                "synthetic-implementors",
+                "Auto implementors",
+                "<div class='item-list' id='synthetic-implementors-list'>",
+            );
             write_loading_content(w, "</div>");
         }
     }
@@ -2590,18 +2688,21 @@ fn item_trait(
         serde_json::to_string(&synthetic_types).unwrap(),
     );
 
-    write!(w, r#"<script type="text/javascript" async
+    write!(
+        w,
+        r#"<script type="text/javascript" async
                          src="{root_path}/implementors/{path}/{ty}.{name}.js">
                  </script>"#,
-           root_path = vec![".."; cx.current.len()].join("/"),
-           path = if it.def_id.is_local() {
-               cx.current.join("/")
-           } else {
-               let (ref path, _) = cx.cache.external_paths[&it.def_id];
-               path[..path.len() - 1].join("/")
-           },
-           ty = it.type_(),
-           name = *it.name.as_ref().unwrap());
+        root_path = vec![".."; cx.current.len()].join("/"),
+        path = if it.def_id.is_local() {
+            cx.current.join("/")
+        } else {
+            let (ref path, _) = cx.cache.external_paths[&it.def_id];
+            path[..path.len() - 1].join("/")
+        },
+        ty = it.type_(),
+        name = *it.name.as_ref().unwrap()
+    );
 }
 
 fn naive_assoc_href(it: &clean::Item, link: AssocItemLink<'_>) -> String {
@@ -2610,7 +2711,7 @@ fn naive_assoc_href(it: &clean::Item, link: AssocItemLink<'_>) -> String {
     let name = it.name.as_ref().unwrap();
     let ty = match it.type_() {
         Typedef | AssocType => AssocType,
-        s@_ => s,
+        s @ _ => s,
     };
 
     let anchor = format!("#{}.{}", ty, name);
@@ -2623,29 +2724,40 @@ fn naive_assoc_href(it: &clean::Item, link: AssocItemLink<'_>) -> String {
     }
 }
 
-fn assoc_const(w: &mut Buffer,
-               it: &clean::Item,
-               ty: &clean::Type,
-               _default: Option<&String>,
-               link: AssocItemLink<'_>,
-               extra: &str) {
-    write!(w, "{}{}const <a href='{}' class=\"constant\"><b>{}</b></a>: {}",
-           extra,
-           it.visibility.print_with_space(),
-           naive_assoc_href(it, link),
-           it.name.as_ref().unwrap(),
-           ty.print());
+fn assoc_const(
+    w: &mut Buffer,
+    it: &clean::Item,
+    ty: &clean::Type,
+    _default: Option<&String>,
+    link: AssocItemLink<'_>,
+    extra: &str,
+) {
+    write!(
+        w,
+        "{}{}const <a href='{}' class=\"constant\"><b>{}</b></a>: {}",
+        extra,
+        it.visibility.print_with_space(),
+        naive_assoc_href(it, link),
+        it.name.as_ref().unwrap(),
+        ty.print()
+    );
 }
 
-fn assoc_type(w: &mut Buffer, it: &clean::Item,
-              bounds: &[clean::GenericBound],
-              default: Option<&clean::Type>,
-              link: AssocItemLink<'_>,
-              extra: &str) {
-    write!(w, "{}type <a href='{}' class=\"type\">{}</a>",
-           extra,
-           naive_assoc_href(it, link),
-           it.name.as_ref().unwrap());
+fn assoc_type(
+    w: &mut Buffer,
+    it: &clean::Item,
+    bounds: &[clean::GenericBound],
+    default: Option<&clean::Type>,
+    link: AssocItemLink<'_>,
+    extra: &str,
+) {
+    write!(
+        w,
+        "{}type <a href='{}' class=\"type\">{}</a>",
+        extra,
+        naive_assoc_href(it, link),
+        it.name.as_ref().unwrap()
+    );
     if !bounds.is_empty() {
         write!(w, ": {}", print_generic_bounds(bounds))
     }
@@ -2666,17 +2778,21 @@ fn render_stability_since(w: &mut Buffer, item: &clean::Item, containing_item: &
     render_stability_since_raw(w, item.stable_since(), containing_item.stable_since())
 }
 
-fn render_assoc_item(w: &mut Buffer,
-                     item: &clean::Item,
-                     link: AssocItemLink<'_>,
-                     parent: ItemType) {
-    fn method(w: &mut Buffer,
-              meth: &clean::Item,
-              header: hir::FnHeader,
-              g: &clean::Generics,
-              d: &clean::FnDecl,
-              link: AssocItemLink<'_>,
-              parent: ItemType) {
+fn render_assoc_item(
+    w: &mut Buffer,
+    item: &clean::Item,
+    link: AssocItemLink<'_>,
+    parent: ItemType,
+) {
+    fn method(
+        w: &mut Buffer,
+        meth: &clean::Item,
+        header: hir::FnHeader,
+        g: &clean::Generics,
+        d: &clean::FnDecl,
+        link: AssocItemLink<'_>,
+        parent: ItemType,
+    ) {
         let name = meth.name.as_ref().unwrap();
         let anchor = format!("#{}.{}", meth.type_(), name);
         let href = match link {
@@ -2704,7 +2820,8 @@ fn render_assoc_item(w: &mut Buffer,
             print_abi_with_space(header.abi),
             name,
             g.print()
-        ).len();
+        )
+        .len();
         let (indent, end_newline) = if parent == ItemType::Trait {
             header_len += 4;
             (4, false)
@@ -2712,47 +2829,45 @@ fn render_assoc_item(w: &mut Buffer,
             (0, true)
         };
         render_attributes(w, meth, false);
-        write!(w, "{}{}{}{}{}{}{}fn <a href='{href}' class='fnname'>{name}</a>\
+        write!(
+            w,
+            "{}{}{}{}{}{}{}fn <a href='{href}' class='fnname'>{name}</a>\
                    {generics}{decl}{where_clause}",
-               if parent == ItemType::Trait { "    " } else { "" },
-               meth.visibility.print_with_space(),
-               header.constness.print_with_space(),
-               header.unsafety.print_with_space(),
-               header.asyncness.print_with_space(),
-               print_default_space(meth.is_default()),
-               print_abi_with_space(header.abi),
-               href = href,
-               name = name,
-               generics = g.print(),
-               decl = Function {
-                   decl: d,
-                   header_len,
-                   indent,
-                   asyncness: header.asyncness,
-               }.print(),
-               where_clause = WhereClause {
-                   gens: g,
-                   indent,
-                   end_newline,
-               })
+            if parent == ItemType::Trait { "    " } else { "" },
+            meth.visibility.print_with_space(),
+            header.constness.print_with_space(),
+            header.unsafety.print_with_space(),
+            header.asyncness.print_with_space(),
+            print_default_space(meth.is_default()),
+            print_abi_with_space(header.abi),
+            href = href,
+            name = name,
+            generics = g.print(),
+            decl = Function { decl: d, header_len, indent, asyncness: header.asyncness }.print(),
+            where_clause = WhereClause { gens: g, indent, end_newline }
+        )
     }
     match item.inner {
-        clean::StrippedItem(..) => {},
-        clean::TyMethodItem(ref m) => {
-            method(w, item, m.header, &m.generics, &m.decl, link, parent)
-        }
-        clean::MethodItem(ref m) => {
-            method(w, item, m.header, &m.generics, &m.decl, link, parent)
-        }
-        clean::AssocConstItem(ref ty, ref default) => {
-            assoc_const(w, item, ty, default.as_ref(), link,
-                        if parent == ItemType::Trait { "    " } else { "" })
-        }
-        clean::AssocTypeItem(ref bounds, ref default) => {
-            assoc_type(w, item, bounds, default.as_ref(), link,
-                       if parent == ItemType::Trait { "    " } else { "" })
-        }
-        _ => panic!("render_assoc_item called on non-associated-item")
+        clean::StrippedItem(..) => {}
+        clean::TyMethodItem(ref m) => method(w, item, m.header, &m.generics, &m.decl, link, parent),
+        clean::MethodItem(ref m) => method(w, item, m.header, &m.generics, &m.decl, link, parent),
+        clean::AssocConstItem(ref ty, ref default) => assoc_const(
+            w,
+            item,
+            ty,
+            default.as_ref(),
+            link,
+            if parent == ItemType::Trait { "    " } else { "" },
+        ),
+        clean::AssocTypeItem(ref bounds, ref default) => assoc_type(
+            w,
+            item,
+            bounds,
+            default.as_ref(),
+            link,
+            if parent == ItemType::Trait { "    " } else { "" },
+        ),
+        _ => panic!("render_assoc_item called on non-associated-item"),
     }
 }
 
@@ -2760,45 +2875,51 @@ fn item_struct(w: &mut Buffer, cx: &Context, it: &clean::Item, s: &clean::Struct
     wrap_into_docblock(w, |w| {
         write!(w, "<pre class='rust struct'>");
         render_attributes(w, it, true);
-        render_struct(w,
-                      it,
-                      Some(&s.generics),
-                      s.struct_type,
-                      &s.fields,
-                      "",
-                      true);
+        render_struct(w, it, Some(&s.generics), s.struct_type, &s.fields, "", true);
         write!(w, "</pre>")
     });
 
     document(w, cx, it);
-    let mut fields = s.fields.iter().filter_map(|f| {
-        match f.inner {
+    let mut fields = s
+        .fields
+        .iter()
+        .filter_map(|f| match f.inner {
             clean::StructFieldItem(ref ty) => Some((f, ty)),
             _ => None,
-        }
-    }).peekable();
+        })
+        .peekable();
     if let doctree::Plain = s.struct_type {
         if fields.peek().is_some() {
-            write!(w, "<h2 id='fields' class='fields small-section-header'>
+            write!(
+                w,
+                "<h2 id='fields' class='fields small-section-header'>
                        Fields{}<a href='#fields' class='anchor'></a></h2>",
-                       document_non_exhaustive_header(it));
+                document_non_exhaustive_header(it)
+            );
             document_non_exhaustive(w, it);
             for (field, ty) in fields {
-                let id = cx.derive_id(format!("{}.{}",
-                                           ItemType::StructField,
-                                           field.name.as_ref().unwrap()));
-                let ns_id = cx.derive_id(format!("{}.{}",
-                                              field.name.as_ref().unwrap(),
-                                              ItemType::StructField.name_space()));
-                write!(w, "<span id=\"{id}\" class=\"{item_type} small-section-header\">\
+                let id = cx.derive_id(format!(
+                    "{}.{}",
+                    ItemType::StructField,
+                    field.name.as_ref().unwrap()
+                ));
+                let ns_id = cx.derive_id(format!(
+                    "{}.{}",
+                    field.name.as_ref().unwrap(),
+                    ItemType::StructField.name_space()
+                ));
+                write!(
+                    w,
+                    "<span id=\"{id}\" class=\"{item_type} small-section-header\">\
                            <a href=\"#{id}\" class=\"anchor field\"></a>\
                            <code id=\"{ns_id}\">{name}: {ty}</code>\
                            </span>",
-                       item_type = ItemType::StructField,
-                       id = id,
-                       ns_id = ns_id,
-                       name = field.name.as_ref().unwrap(),
-                       ty = ty.print());
+                    item_type = ItemType::StructField,
+                    id = id,
+                    ns_id = ns_id,
+                    name = field.name.as_ref().unwrap(),
+                    ty = ty.print()
+                );
                 document(w, cx, field);
             }
         }
@@ -2810,39 +2931,41 @@ fn item_union(w: &mut Buffer, cx: &Context, it: &clean::Item, s: &clean::Union)
     wrap_into_docblock(w, |w| {
         write!(w, "<pre class='rust union'>");
         render_attributes(w, it, true);
-        render_union(w,
-                     it,
-                     Some(&s.generics),
-                     &s.fields,
-                     "",
-                     true);
+        render_union(w, it, Some(&s.generics), &s.fields, "", true);
         write!(w, "</pre>")
     });
 
     document(w, cx, it);
-    let mut fields = s.fields.iter().filter_map(|f| {
-        match f.inner {
+    let mut fields = s
+        .fields
+        .iter()
+        .filter_map(|f| match f.inner {
             clean::StructFieldItem(ref ty) => Some((f, ty)),
             _ => None,
-        }
-    }).peekable();
+        })
+        .peekable();
     if fields.peek().is_some() {
-        write!(w, "<h2 id='fields' class='fields small-section-header'>
-                   Fields<a href='#fields' class='anchor'></a></h2>");
+        write!(
+            w,
+            "<h2 id='fields' class='fields small-section-header'>
+                   Fields<a href='#fields' class='anchor'></a></h2>"
+        );
         for (field, ty) in fields {
             let name = field.name.as_ref().expect("union field name");
             let id = format!("{}.{}", ItemType::StructField, name);
-            write!(w, "<span id=\"{id}\" class=\"{shortty} small-section-header\">\
+            write!(
+                w,
+                "<span id=\"{id}\" class=\"{shortty} small-section-header\">\
                            <a href=\"#{id}\" class=\"anchor field\"></a>\
                            <code>{name}: {ty}</code>\
                        </span>",
-                   id = id,
-                   name = name,
-                   shortty = ItemType::StructField,
-                   ty = ty.print());
+                id = id,
+                name = name,
+                shortty = ItemType::StructField,
+                ty = ty.print()
+            );
             if let Some(stability_class) = field.stability_class() {
-                write!(w, "<span class='stab {stab}'></span>",
-                    stab = stability_class);
+                write!(w, "<span class='stab {stab}'></span>", stab = stability_class);
             }
             document(w, cx, field);
         }
@@ -2854,11 +2977,14 @@ fn item_enum(w: &mut Buffer, cx: &Context, it: &clean::Item, e: &clean::Enum) {
     wrap_into_docblock(w, |w| {
         write!(w, "<pre class='rust enum'>");
         render_attributes(w, it, true);
-        write!(w, "{}enum {}{}{}",
-               it.visibility.print_with_space(),
-               it.name.as_ref().unwrap(),
-               e.generics.print(),
-               WhereClause { gens: &e.generics, indent: 0, end_newline: true });
+        write!(
+            w,
+            "{}enum {}{}{}",
+            it.visibility.print_with_space(),
+            it.name.as_ref().unwrap(),
+            e.generics.print(),
+            WhereClause { gens: &e.generics, indent: 0, end_newline: true }
+        );
         if e.variants.is_empty() && !e.variants_stripped {
             write!(w, " {{}}");
         } else {
@@ -2867,31 +2993,23 @@ fn item_enum(w: &mut Buffer, cx: &Context, it: &clean::Item, e: &clean::Enum) {
                 write!(w, "    ");
                 let name = v.name.as_ref().unwrap();
                 match v.inner {
-                    clean::VariantItem(ref var) => {
-                        match var.kind {
-                            clean::VariantKind::CLike => write!(w, "{}", name),
-                            clean::VariantKind::Tuple(ref tys) => {
-                                write!(w, "{}(", name);
-                                for (i, ty) in tys.iter().enumerate() {
-                                    if i > 0 {
-                                        write!(w, ",&nbsp;")
-                                    }
-                                    write!(w, "{}", ty.print());
+                    clean::VariantItem(ref var) => match var.kind {
+                        clean::VariantKind::CLike => write!(w, "{}", name),
+                        clean::VariantKind::Tuple(ref tys) => {
+                            write!(w, "{}(", name);
+                            for (i, ty) in tys.iter().enumerate() {
+                                if i > 0 {
+                                    write!(w, ",&nbsp;")
                                 }
-                                write!(w, ")");
-                            }
-                            clean::VariantKind::Struct(ref s) => {
-                                render_struct(w,
-                                              v,
-                                              None,
-                                              s.struct_type,
-                                              &s.fields,
-                                              "    ",
-                                              false);
+                                write!(w, "{}", ty.print());
                             }
+                            write!(w, ")");
                         }
-                    }
-                    _ => unreachable!()
+                        clean::VariantKind::Struct(ref s) => {
+                            render_struct(w, v, None, s.struct_type, &s.fields, "    ", false);
+                        }
+                    },
+                    _ => unreachable!(),
                 }
                 write!(w, ",\n");
             }
@@ -2906,23 +3024,30 @@ fn item_enum(w: &mut Buffer, cx: &Context, it: &clean::Item, e: &clean::Enum) {
 
     document(w, cx, it);
     if !e.variants.is_empty() {
-        write!(w, "<h2 id='variants' class='variants small-section-header'>
+        write!(
+            w,
+            "<h2 id='variants' class='variants small-section-header'>
                    Variants{}<a href='#variants' class='anchor'></a></h2>\n",
-                   document_non_exhaustive_header(it));
+            document_non_exhaustive_header(it)
+        );
         document_non_exhaustive(w, it);
         for variant in &e.variants {
-            let id = cx.derive_id(format!("{}.{}",
-                                       ItemType::Variant,
-                                       variant.name.as_ref().unwrap()));
-            let ns_id = cx.derive_id(format!("{}.{}",
-                                          variant.name.as_ref().unwrap(),
-                                          ItemType::Variant.name_space()));
-            write!(w, "<div id=\"{id}\" class=\"variant small-section-header\">\
+            let id =
+                cx.derive_id(format!("{}.{}", ItemType::Variant, variant.name.as_ref().unwrap()));
+            let ns_id = cx.derive_id(format!(
+                "{}.{}",
+                variant.name.as_ref().unwrap(),
+                ItemType::Variant.name_space()
+            ));
+            write!(
+                w,
+                "<div id=\"{id}\" class=\"variant small-section-header\">\
                        <a href=\"#{id}\" class=\"anchor field\"></a>\
                        <code id='{ns_id}'>{name}",
-                   id = id,
-                   ns_id = ns_id,
-                   name = variant.name.as_ref().unwrap());
+                id = id,
+                ns_id = ns_id,
+                name = variant.name.as_ref().unwrap()
+            );
             if let clean::VariantItem(ref var) = variant.inner {
                 if let clean::VariantKind::Tuple(ref tys) = var.kind {
                     write!(w, "(");
@@ -2940,35 +3065,45 @@ fn item_enum(w: &mut Buffer, cx: &Context, it: &clean::Item, e: &clean::Enum) {
             document_non_exhaustive(w, variant);
 
             use crate::clean::{Variant, VariantKind};
-            if let clean::VariantItem(Variant {
-                kind: VariantKind::Struct(ref s)
-            }) = variant.inner {
-                let variant_id = cx.derive_id(format!("{}.{}.fields",
-                                                   ItemType::Variant,
-                                                   variant.name.as_ref().unwrap()));
-                write!(w, "<div class='autohide sub-variant' id='{id}'>",
-                       id = variant_id);
-                write!(w, "<h3>Fields of <b>{name}</b></h3><div>",
-                       name = variant.name.as_ref().unwrap());
+            if let clean::VariantItem(Variant { kind: VariantKind::Struct(ref s) }) = variant.inner
+            {
+                let variant_id = cx.derive_id(format!(
+                    "{}.{}.fields",
+                    ItemType::Variant,
+                    variant.name.as_ref().unwrap()
+                ));
+                write!(w, "<div class='autohide sub-variant' id='{id}'>", id = variant_id);
+                write!(
+                    w,
+                    "<h3>Fields of <b>{name}</b></h3><div>",
+                    name = variant.name.as_ref().unwrap()
+                );
                 for field in &s.fields {
                     use crate::clean::StructFieldItem;
                     if let StructFieldItem(ref ty) = field.inner {
-                        let id = cx.derive_id(format!("variant.{}.field.{}",
-                                                   variant.name.as_ref().unwrap(),
-                                                   field.name.as_ref().unwrap()));
-                        let ns_id = cx.derive_id(format!("{}.{}.{}.{}",
-                                                      variant.name.as_ref().unwrap(),
-                                                      ItemType::Variant.name_space(),
-                                                      field.name.as_ref().unwrap(),
-                                                      ItemType::StructField.name_space()));
-                        write!(w, "<span id=\"{id}\" class=\"variant small-section-header\">\
+                        let id = cx.derive_id(format!(
+                            "variant.{}.field.{}",
+                            variant.name.as_ref().unwrap(),
+                            field.name.as_ref().unwrap()
+                        ));
+                        let ns_id = cx.derive_id(format!(
+                            "{}.{}.{}.{}",
+                            variant.name.as_ref().unwrap(),
+                            ItemType::Variant.name_space(),
+                            field.name.as_ref().unwrap(),
+                            ItemType::StructField.name_space()
+                        ));
+                        write!(
+                            w,
+                            "<span id=\"{id}\" class=\"variant small-section-header\">\
                                    <a href=\"#{id}\" class=\"anchor field\"></a>\
                                    <code id='{ns_id}'>{f}:&nbsp;{t}\
                                    </code></span>",
-                               id = id,
-                               ns_id = ns_id,
-                               f = field.name.as_ref().unwrap(),
-                               t = ty.print());
+                            id = id,
+                            ns_id = ns_id,
+                            f = field.name.as_ref().unwrap(),
+                            t = ty.print()
+                        );
                         document(w, cx, field);
                     }
                 }
@@ -2988,15 +3123,12 @@ fn render_attribute(attr: &ast::MetaItem) -> Option<String> {
     } else if let Some(v) = attr.value_str() {
         Some(format!("{} = {:?}", path, v))
     } else if let Some(values) = attr.meta_item_list() {
-        let display: Vec<_> = values.iter().filter_map(|attr| {
-            attr.meta_item().and_then(|mi| render_attribute(mi))
-        }).collect();
+        let display: Vec<_> = values
+            .iter()
+            .filter_map(|attr| attr.meta_item().and_then(|mi| render_attribute(mi)))
+            .collect();
 
-        if display.len() > 0 {
-            Some(format!("{}({})", path, display.join(", ")))
-        } else {
-            None
-        }
+        if display.len() > 0 { Some(format!("{}({})", path, display.join(", "))) } else { None }
     } else {
         None
     }
@@ -3009,7 +3141,7 @@ const ATTRIBUTE_WHITELIST: &'static [Symbol] = &[
     sym::must_use,
     sym::no_mangle,
     sym::repr,
-    sym::non_exhaustive
+    sym::non_exhaustive,
 ];
 
 // The `top` parameter is used when generating the item declaration to ensure it doesn't have a
@@ -3032,21 +3164,31 @@ fn render_attributes(w: &mut Buffer, it: &clean::Item, top: bool) {
         }
     }
     if attrs.len() > 0 {
-        write!(w, "<span class=\"docblock attributes{}\">{}</span>",
-               if top { " top-attr" } else { "" }, &attrs);
+        write!(
+            w,
+            "<span class=\"docblock attributes{}\">{}</span>",
+            if top { " top-attr" } else { "" },
+            &attrs
+        );
     }
 }
 
-fn render_struct(w: &mut Buffer, it: &clean::Item,
-                 g: Option<&clean::Generics>,
-                 ty: doctree::StructType,
-                 fields: &[clean::Item],
-                 tab: &str,
-                 structhead: bool) {
-    write!(w, "{}{}{}",
-           it.visibility.print_with_space(),
-           if structhead {"struct "} else {""},
-           it.name.as_ref().unwrap());
+fn render_struct(
+    w: &mut Buffer,
+    it: &clean::Item,
+    g: Option<&clean::Generics>,
+    ty: doctree::StructType,
+    fields: &[clean::Item],
+    tab: &str,
+    structhead: bool,
+) {
+    write!(
+        w,
+        "{}{}{}",
+        it.visibility.print_with_space(),
+        if structhead { "struct " } else { "" },
+        it.name.as_ref().unwrap()
+    );
     if let Some(g) = g {
         write!(w, "{}", g.print())
     }
@@ -3059,11 +3201,14 @@ fn render_struct(w: &mut Buffer, it: &clean::Item,
             write!(w, " {{");
             for field in fields {
                 if let clean::StructFieldItem(ref ty) = field.inner {
-                    write!(w, "\n{}    {}{}: {},",
-                           tab,
-                           field.visibility.print_with_space(),
-                           field.name.as_ref().unwrap(),
-                           ty.print());
+                    write!(
+                        w,
+                        "\n{}    {}{}: {},",
+                        tab,
+                        field.visibility.print_with_space(),
+                        field.name.as_ref().unwrap(),
+                        ty.print()
+                    );
                     has_visible_fields = true;
                 }
             }
@@ -3087,13 +3232,11 @@ fn render_struct(w: &mut Buffer, it: &clean::Item,
                     write!(w, ", ");
                 }
                 match field.inner {
-                    clean::StrippedItem(box clean::StructFieldItem(..)) => {
-                        write!(w, "_")
-                    }
+                    clean::StrippedItem(box clean::StructFieldItem(..)) => write!(w, "_"),
                     clean::StructFieldItem(ref ty) => {
                         write!(w, "{}{}", field.visibility.print_with_space(), ty.print())
                     }
-                    _ => unreachable!()
+                    _ => unreachable!(),
                 }
             }
             write!(w, ")");
@@ -3112,15 +3255,21 @@ fn render_struct(w: &mut Buffer, it: &clean::Item,
     }
 }
 
-fn render_union(w: &mut Buffer, it: &clean::Item,
-                g: Option<&clean::Generics>,
-                fields: &[clean::Item],
-                tab: &str,
-                structhead: bool) {
-    write!(w, "{}{}{}",
-           it.visibility.print_with_space(),
-           if structhead {"union "} else {""},
-           it.name.as_ref().unwrap());
+fn render_union(
+    w: &mut Buffer,
+    it: &clean::Item,
+    g: Option<&clean::Generics>,
+    fields: &[clean::Item],
+    tab: &str,
+    structhead: bool,
+) {
+    write!(
+        w,
+        "{}{}{}",
+        it.visibility.print_with_space(),
+        if structhead { "union " } else { "" },
+        it.name.as_ref().unwrap()
+    );
     if let Some(g) = g {
         write!(w, "{}", g.print());
         write!(w, "{}", WhereClause { gens: g, indent: 0, end_newline: true });
@@ -3129,11 +3278,14 @@ fn render_union(w: &mut Buffer, it: &clean::Item,
     write!(w, " {{\n{}", tab);
     for field in fields {
         if let clean::StructFieldItem(ref ty) = field.inner {
-            write!(w, "    {}{}: {},\n{}",
-                   field.visibility.print_with_space(),
-                   field.name.as_ref().unwrap(),
-                   ty.print(),
-                   tab);
+            write!(
+                w,
+                "    {}{}: {},\n{}",
+                field.visibility.print_with_space(),
+                field.name.as_ref().unwrap(),
+                ty.print(),
+                tab
+            );
         }
     }
 
@@ -3152,7 +3304,7 @@ enum AssocItemLink<'a> {
 impl<'a> AssocItemLink<'a> {
     fn anchor(&self, id: &'a String) -> Self {
         match *self {
-            AssocItemLink::Anchor(_) => { AssocItemLink::Anchor(Some(&id)) },
+            AssocItemLink::Anchor(_) => AssocItemLink::Anchor(Some(&id)),
             ref other => *other,
         }
     }
@@ -3160,7 +3312,7 @@ impl<'a> AssocItemLink<'a> {
 
 enum AssocItemRender<'a> {
     All,
-    DerefFor { trait_: &'a clean::Type, type_: &'a clean::Type, deref_mut_: bool }
+    DerefFor { trait_: &'a clean::Type, type_: &'a clean::Type, deref_mut_: bool },
 }
 
 #[derive(Copy, Clone, PartialEq)]
@@ -3169,113 +3321,148 @@ enum RenderMode {
     ForDeref { mut_: bool },
 }
 
-fn render_assoc_items(w: &mut Buffer,
-                      cx: &Context,
-                      containing_item: &clean::Item,
-                      it: DefId,
-                      what: AssocItemRender<'_>) {
+fn render_assoc_items(
+    w: &mut Buffer,
+    cx: &Context,
+    containing_item: &clean::Item,
+    it: DefId,
+    what: AssocItemRender<'_>,
+) {
     let c = &cx.cache;
     let v = match c.impls.get(&it) {
         Some(v) => v,
         None => return,
     };
-    let (non_trait, traits): (Vec<_>, _) = v.iter().partition(|i| {
-        i.inner_impl().trait_.is_none()
-    });
+    let (non_trait, traits): (Vec<_>, _) = v.iter().partition(|i| i.inner_impl().trait_.is_none());
     if !non_trait.is_empty() {
         let render_mode = match what {
             AssocItemRender::All => {
-                write!(w, "\
+                write!(
+                    w,
+                    "\
                     <h2 id='methods' class='small-section-header'>\
                       Methods<a href='#methods' class='anchor'></a>\
                     </h2>\
-                ");
+                "
+                );
                 RenderMode::Normal
             }
             AssocItemRender::DerefFor { trait_, type_, deref_mut_ } => {
-                write!(w, "\
+                write!(
+                    w,
+                    "\
                     <h2 id='deref-methods' class='small-section-header'>\
                       Methods from {}&lt;Target = {}&gt;\
                       <a href='#deref-methods' class='anchor'></a>\
                     </h2>\
-                ", trait_.print(), type_.print());
+                ",
+                    trait_.print(),
+                    type_.print()
+                );
                 RenderMode::ForDeref { mut_: deref_mut_ }
             }
         };
         for i in &non_trait {
-            render_impl(w, cx, i, AssocItemLink::Anchor(None), render_mode,
-                        containing_item.stable_since(), true, None, false, true);
+            render_impl(
+                w,
+                cx,
+                i,
+                AssocItemLink::Anchor(None),
+                render_mode,
+                containing_item.stable_since(),
+                true,
+                None,
+                false,
+                true,
+            );
         }
     }
     if let AssocItemRender::DerefFor { .. } = what {
         return;
     }
     if !traits.is_empty() {
-        let deref_impl = traits.iter().find(|t| {
-            t.inner_impl().trait_.def_id() == c.deref_trait_did
-        });
+        let deref_impl =
+            traits.iter().find(|t| t.inner_impl().trait_.def_id() == c.deref_trait_did);
         if let Some(impl_) = deref_impl {
-            let has_deref_mut = traits.iter().find(|t| {
-                t.inner_impl().trait_.def_id() == c.deref_mut_trait_did
-            }).is_some();
+            let has_deref_mut = traits
+                .iter()
+                .find(|t| t.inner_impl().trait_.def_id() == c.deref_mut_trait_did)
+                .is_some();
             render_deref_methods(w, cx, impl_, containing_item, has_deref_mut);
         }
 
-        let (synthetic, concrete): (Vec<&&Impl>, Vec<&&Impl>) = traits
-            .iter()
-            .partition(|t| t.inner_impl().synthetic);
-        let (blanket_impl, concrete): (Vec<&&Impl>, _) = concrete
-            .into_iter()
-            .partition(|t| t.inner_impl().blanket_impl.is_some());
+        let (synthetic, concrete): (Vec<&&Impl>, Vec<&&Impl>) =
+            traits.iter().partition(|t| t.inner_impl().synthetic);
+        let (blanket_impl, concrete): (Vec<&&Impl>, _) =
+            concrete.into_iter().partition(|t| t.inner_impl().blanket_impl.is_some());
 
         let mut impls = Buffer::empty_from(&w);
         render_impls(cx, &mut impls, &concrete, containing_item);
         let impls = impls.into_inner();
         if !impls.is_empty() {
-            write!(w, "\
+            write!(
+                w,
+                "\
                 <h2 id='implementations' class='small-section-header'>\
                   Trait Implementations<a href='#implementations' class='anchor'></a>\
                 </h2>\
-                <div id='implementations-list'>{}</div>", impls);
+                <div id='implementations-list'>{}</div>",
+                impls
+            );
         }
 
         if !synthetic.is_empty() {
-            write!(w, "\
+            write!(
+                w,
+                "\
                 <h2 id='synthetic-implementations' class='small-section-header'>\
                   Auto Trait Implementations\
                   <a href='#synthetic-implementations' class='anchor'></a>\
                 </h2>\
                 <div id='synthetic-implementations-list'>\
-            ");
+            "
+            );
             render_impls(cx, w, &synthetic, containing_item);
             write!(w, "</div>");
         }
 
         if !blanket_impl.is_empty() {
-            write!(w, "\
+            write!(
+                w,
+                "\
                 <h2 id='blanket-implementations' class='small-section-header'>\
                   Blanket Implementations\
                   <a href='#blanket-implementations' class='anchor'></a>\
                 </h2>\
                 <div id='blanket-implementations-list'>\
-            ");
+            "
+            );
             render_impls(cx, w, &blanket_impl, containing_item);
             write!(w, "</div>");
         }
     }
 }
 
-fn render_deref_methods(w: &mut Buffer, cx: &Context, impl_: &Impl,
-                        container_item: &clean::Item, deref_mut: bool) {
+fn render_deref_methods(
+    w: &mut Buffer,
+    cx: &Context,
+    impl_: &Impl,
+    container_item: &clean::Item,
+    deref_mut: bool,
+) {
     let deref_type = impl_.inner_impl().trait_.as_ref().unwrap();
-    let target = impl_.inner_impl().items.iter().filter_map(|item| {
-        match item.inner {
+    let target = impl_
+        .inner_impl()
+        .items
+        .iter()
+        .filter_map(|item| match item.inner {
             clean::TypedefItem(ref t, true) => Some(&t.type_),
             _ => None,
-        }
-    }).next().expect("Expected associated type binding");
-    let what = AssocItemRender::DerefFor { trait_: deref_type, type_: target,
-                                           deref_mut_: deref_mut };
+        })
+        .next()
+        .expect("Expected associated type binding");
+    let what =
+        AssocItemRender::DerefFor { trait_: deref_type, type_: target, deref_mut_: deref_mut };
     if let Some(did) = target.def_id() {
         render_assoc_items(w, cx, container_item, did, what)
     } else {
@@ -3291,18 +3478,18 @@ fn should_render_item(item: &clean::Item, deref_mut_: bool) -> bool {
     let self_type_opt = match item.inner {
         clean::MethodItem(ref method) => method.decl.self_type(),
         clean::TyMethodItem(ref method) => method.decl.self_type(),
-        _ => None
+        _ => None,
     };
 
     if let Some(self_ty) = self_type_opt {
         let (by_mut_ref, by_box, by_value) = match self_ty {
-            SelfTy::SelfBorrowed(_, mutability) |
-            SelfTy::SelfExplicit(clean::BorrowedRef { mutability, .. }) => {
+            SelfTy::SelfBorrowed(_, mutability)
+            | SelfTy::SelfExplicit(clean::BorrowedRef { mutability, .. }) => {
                 (mutability == Mutability::Mut, false, false)
-            },
+            }
             SelfTy::SelfExplicit(clean::ResolvedPath { did, .. }) => {
                 (false, Some(did) == cache().owned_box_did, false)
-            },
+            }
             SelfTy::SelfValue => (false, false, true),
             _ => (false, false, false),
         };
@@ -3315,13 +3502,11 @@ fn should_render_item(item: &clean::Item, deref_mut_: bool) -> bool {
 
 fn render_spotlight_traits(item: &clean::Item) -> String {
     match item.inner {
-        clean::FunctionItem(clean::Function { ref decl, .. }) |
-        clean::TyMethodItem(clean::TyMethod { ref decl, .. }) |
-        clean::MethodItem(clean::Method { ref decl, .. }) |
-        clean::ForeignFunctionItem(clean::Function { ref decl, .. }) => {
-            spotlight_decl(decl)
-        }
-        _ => String::new()
+        clean::FunctionItem(clean::Function { ref decl, .. })
+        | clean::TyMethodItem(clean::TyMethod { ref decl, .. })
+        | clean::MethodItem(clean::Method { ref decl, .. })
+        | clean::ForeignFunctionItem(clean::Function { ref decl, .. }) => spotlight_decl(decl),
+        _ => String::new(),
     }
 }
 
@@ -3336,24 +3521,31 @@ fn spotlight_decl(decl: &clean::FnDecl) -> String {
                 let impl_ = i.inner_impl();
                 if impl_.trait_.def_id().map_or(false, |d| c.traits[&d].is_spotlight) {
                     if out.is_empty() {
-                        out.push_str(
-                            &format!("<h3 class=\"important\">Important traits for {}</h3>\
+                        out.push_str(&format!(
+                            "<h3 class=\"important\">Important traits for {}</h3>\
                                       <code class=\"content\">",
-                                     impl_.for_.print()));
+                            impl_.for_.print()
+                        ));
                         trait_.push_str(&impl_.for_.print().to_string());
                     }
 
                     //use the "where" class here to make it small
-                    out.push_str(
-                        &format!("<span class=\"where fmt-newline\">{}</span>", impl_.print()));
+                    out.push_str(&format!(
+                        "<span class=\"where fmt-newline\">{}</span>",
+                        impl_.print()
+                    ));
                     let t_did = impl_.trait_.def_id().unwrap();
                     for it in &impl_.items {
                         if let clean::TypedefItem(ref tydef, _) = it.inner {
                             out.push_str("<span class=\"where fmt-newline\">    ");
-                            assoc_type(&mut out, it, &[],
-                                       Some(&tydef.type_),
-                                       AssocItemLink::GotoSource(t_did, &FxHashSet::default()),
-                                       "");
+                            assoc_type(
+                                &mut out,
+                                it,
+                                &[],
+                                Some(&tydef.type_),
+                                AssocItemLink::GotoSource(t_did, &FxHashSet::default()),
+                                "",
+                            );
                             out.push_str(";</span>");
                         }
                     }
@@ -3363,27 +3555,42 @@ fn spotlight_decl(decl: &clean::FnDecl) -> String {
     }
 
     if !out.is_empty() {
-        out.insert_str(0, &format!("<div class=\"important-traits\"><div class='tooltip'>ⓘ\
+        out.insert_str(
+            0,
+            &format!(
+                "<div class=\"important-traits\"><div class='tooltip'>ⓘ\
                                     <span class='tooltiptext'>Important traits for {}</span></div>\
                                     <div class=\"content hidden\">",
-                                   trait_));
+                trait_
+            ),
+        );
         out.push_str("</code></div></div>");
     }
 
     out.into_inner()
 }
 
-fn render_impl(w: &mut Buffer, cx: &Context, i: &Impl, link: AssocItemLink<'_>,
-               render_mode: RenderMode, outer_version: Option<&str>, show_def_docs: bool,
-               use_absolute: Option<bool>, is_on_foreign_type: bool,
-               show_default_items: bool) {
+fn render_impl(
+    w: &mut Buffer,
+    cx: &Context,
+    i: &Impl,
+    link: AssocItemLink<'_>,
+    render_mode: RenderMode,
+    outer_version: Option<&str>,
+    show_def_docs: bool,
+    use_absolute: Option<bool>,
+    is_on_foreign_type: bool,
+    show_default_items: bool,
+) {
     if render_mode == RenderMode::Normal {
         let id = cx.derive_id(match i.inner_impl().trait_ {
-            Some(ref t) => if is_on_foreign_type {
-                get_id_for_impl_on_foreign_type(&i.inner_impl().for_, t)
-            } else {
-                format!("impl-{}", small_url_encode(&format!("{:#}", t.print())))
-            },
+            Some(ref t) => {
+                if is_on_foreign_type {
+                    get_id_for_impl_on_foreign_type(&i.inner_impl().for_, t)
+                } else {
+                    format!("impl-{}", small_url_encode(&format!("{:#}", t.print())))
+                }
+            }
             None => "impl".to_string(),
         });
         if let Some(use_absolute) = use_absolute {
@@ -3393,39 +3600,63 @@ fn render_impl(w: &mut Buffer, cx: &Context, i: &Impl, link: AssocItemLink<'_>,
                 for it in &i.inner_impl().items {
                     if let clean::TypedefItem(ref tydef, _) = it.inner {
                         write!(w, "<span class=\"where fmt-newline\">  ");
-                        assoc_type(w, it, &vec![], Some(&tydef.type_),
-                                   AssocItemLink::Anchor(None),
-                                   "");
+                        assoc_type(
+                            w,
+                            it,
+                            &vec![],
+                            Some(&tydef.type_),
+                            AssocItemLink::Anchor(None),
+                            "",
+                        );
                         write!(w, ";</span>");
                     }
                 }
             }
             write!(w, "</code>");
         } else {
-            write!(w, "<h3 id='{}' class='impl'><code class='in-band'>{}</code>",
-                id, i.inner_impl().print()
+            write!(
+                w,
+                "<h3 id='{}' class='impl'><code class='in-band'>{}</code>",
+                id,
+                i.inner_impl().print()
             );
         }
         write!(w, "<a href='#{}' class='anchor'></a>", id);
         let since = i.impl_item.stability.as_ref().map(|s| &s.since[..]);
         render_stability_since_raw(w, since, outer_version);
         if let Some(l) = cx.src_href(&i.impl_item) {
-            write!(w, "<a class='srclink' href='{}' title='{}'>[src]</a>",
-                   l, "goto source code");
+            write!(w, "<a class='srclink' href='{}' title='{}'>[src]</a>", l, "goto source code");
         }
         write!(w, "</h3>");
         if let Some(ref dox) = cx.shared.maybe_collapsed_doc_value(&i.impl_item) {
             let mut ids = cx.id_map.borrow_mut();
-            write!(w, "<div class='docblock'>{}</div>",
-                   Markdown(&*dox, &i.impl_item.links(), &mut ids,
-                            cx.shared.codes, cx.shared.edition, &cx.shared.playground).to_string());
+            write!(
+                w,
+                "<div class='docblock'>{}</div>",
+                Markdown(
+                    &*dox,
+                    &i.impl_item.links(),
+                    &mut ids,
+                    cx.shared.codes,
+                    cx.shared.edition,
+                    &cx.shared.playground
+                )
+                .to_string()
+            );
         }
     }
 
-    fn doc_impl_item(w: &mut Buffer, cx: &Context, item: &clean::Item,
-                     link: AssocItemLink<'_>, render_mode: RenderMode,
-                     is_default_item: bool, outer_version: Option<&str>,
-                     trait_: Option<&clean::Trait>, show_def_docs: bool) {
+    fn doc_impl_item(
+        w: &mut Buffer,
+        cx: &Context,
+        item: &clean::Item,
+        link: AssocItemLink<'_>,
+        render_mode: RenderMode,
+        is_default_item: bool,
+        outer_version: Option<&str>,
+        trait_: Option<&clean::Trait>,
+        show_def_docs: bool,
+    ) {
         let item_type = item.type_();
         let name = item.name.as_ref().unwrap();
 
@@ -3434,32 +3665,33 @@ fn render_impl(w: &mut Buffer, cx: &Context, i: &Impl, link: AssocItemLink<'_>,
             RenderMode::ForDeref { mut_: deref_mut_ } => should_render_item(&item, deref_mut_),
         };
 
-        let (is_hidden, extra_class) = if (trait_.is_none() ||
-                                           item.doc_value().is_some() ||
-                                           item.inner.is_associated()) &&
-                                          !is_default_item {
-            (false, "")
-        } else {
-            (true, " hidden")
-        };
+        let (is_hidden, extra_class) =
+            if (trait_.is_none() || item.doc_value().is_some() || item.inner.is_associated())
+                && !is_default_item
+            {
+                (false, "")
+            } else {
+                (true, " hidden")
+            };
         match item.inner {
-            clean::MethodItem(clean::Method { ref decl, .. }) |
-            clean::TyMethodItem(clean::TyMethod { ref decl, .. }) => {
+            clean::MethodItem(clean::Method { ref decl, .. })
+            | clean::TyMethodItem(clean::TyMethod { ref decl, .. }) => {
                 // Only render when the method is not static or we allow static methods
                 if render_method_item {
                     let id = cx.derive_id(format!("{}.{}", item_type, name));
-                    let ns_id = cx.derive_id(format!("{}.{}",
-                            name, item_type.name_space()));
-                    write!(w, "<h4 id='{}' class=\"{}{}\">",
-                        id, item_type, extra_class);
+                    let ns_id = cx.derive_id(format!("{}.{}", name, item_type.name_space()));
+                    write!(w, "<h4 id='{}' class=\"{}{}\">", id, item_type, extra_class);
                     write!(w, "{}", spotlight_decl(decl));
                     write!(w, "<code id='{}'>", ns_id);
                     render_assoc_item(w, item, link.anchor(&id), ItemType::Impl);
                     write!(w, "</code>");
                     render_stability_since_raw(w, item.stable_since(), outer_version);
                     if let Some(l) = cx.src_href(item) {
-                        write!(w, "<a class='srclink' href='{}' title='{}'>[src]</a>",
-                               l, "goto source code");
+                        write!(
+                            w,
+                            "<a class='srclink' href='{}' title='{}'>[src]</a>",
+                            l, "goto source code"
+                        );
                     }
                     write!(w, "</h4>");
                 }
@@ -3481,8 +3713,11 @@ fn render_impl(w: &mut Buffer, cx: &Context, i: &Impl, link: AssocItemLink<'_>,
                 write!(w, "</code>");
                 render_stability_since_raw(w, item.stable_since(), outer_version);
                 if let Some(l) = cx.src_href(item) {
-                    write!(w, "<a class='srclink' href='{}' title='{}'>[src]</a>",
-                            l, "goto source code");
+                    write!(
+                        w,
+                        "<a class='srclink' href='{}' title='{}'>[src]</a>",
+                        l, "goto source code"
+                    );
                 }
                 write!(w, "</h4>");
             }
@@ -3495,7 +3730,7 @@ fn render_impl(w: &mut Buffer, cx: &Context, i: &Impl, link: AssocItemLink<'_>,
                 write!(w, "</code></h4>");
             }
             clean::StrippedItem(..) => return,
-            _ => panic!("can't make docs for trait item with name {:?}", item.name)
+            _ => panic!("can't make docs for trait item with name {:?}", item.name),
         }
 
         if render_method_item {
@@ -3535,17 +3770,28 @@ fn render_impl(w: &mut Buffer, cx: &Context, i: &Impl, link: AssocItemLink<'_>,
 
     write!(w, "<div class='impl-items'>");
     for trait_item in &i.inner_impl().items {
-        doc_impl_item(w, cx, trait_item, link, render_mode,
-                      false, outer_version, trait_, show_def_docs);
+        doc_impl_item(
+            w,
+            cx,
+            trait_item,
+            link,
+            render_mode,
+            false,
+            outer_version,
+            trait_,
+            show_def_docs,
+        );
     }
 
-    fn render_default_items(w: &mut Buffer,
-                            cx: &Context,
-                            t: &clean::Trait,
-                            i: &clean::Impl,
-                            render_mode: RenderMode,
-                            outer_version: Option<&str>,
-                            show_def_docs: bool) {
+    fn render_default_items(
+        w: &mut Buffer,
+        cx: &Context,
+        t: &clean::Trait,
+        i: &clean::Impl,
+        render_mode: RenderMode,
+        outer_version: Option<&str>,
+        show_def_docs: bool,
+    ) {
         for trait_item in &t.items {
             let n = trait_item.name.clone();
             if i.items.iter().find(|m| m.name == n).is_some() {
@@ -3554,8 +3800,17 @@ fn render_impl(w: &mut Buffer, cx: &Context, i: &Impl, link: AssocItemLink<'_>,
             let did = i.trait_.as_ref().unwrap().def_id().unwrap();
             let assoc_link = AssocItemLink::GotoSource(did, &i.provided_trait_methods);
 
-            doc_impl_item(w, cx, trait_item, assoc_link, render_mode, true,
-                          outer_version, None, show_def_docs);
+            doc_impl_item(
+                w,
+                cx,
+                trait_item,
+                assoc_link,
+                render_mode,
+                true,
+                outer_version,
+                None,
+                show_def_docs,
+            );
         }
     }
 
@@ -3565,26 +3820,31 @@ fn render_impl(w: &mut Buffer, cx: &Context, i: &Impl, link: AssocItemLink<'_>,
     // Implementations on Foreign Types or Implementors sections.
     if show_default_items {
         if let Some(t) = trait_ {
-            render_default_items(w, cx, t, &i.inner_impl(),
-                                render_mode, outer_version, show_def_docs);
+            render_default_items(
+                w,
+                cx,
+                t,
+                &i.inner_impl(),
+                render_mode,
+                outer_version,
+                show_def_docs,
+            );
         }
     }
     write!(w, "</div>");
 }
 
-fn item_opaque_ty(
-    w: &mut Buffer,
-    cx: &Context,
-    it: &clean::Item,
-    t: &clean::OpaqueTy,
-) {
+fn item_opaque_ty(w: &mut Buffer, cx: &Context, it: &clean::Item, t: &clean::OpaqueTy) {
     write!(w, "<pre class='rust opaque'>");
     render_attributes(w, it, false);
-    write!(w, "type {}{}{where_clause} = impl {bounds};</pre>",
-           it.name.as_ref().unwrap(),
-           t.generics.print(),
-           where_clause = WhereClause { gens: &t.generics, indent: 0, end_newline: true },
-           bounds = bounds(&t.bounds, false));
+    write!(
+        w,
+        "type {}{}{where_clause} = impl {bounds};</pre>",
+        it.name.as_ref().unwrap(),
+        t.generics.print(),
+        where_clause = WhereClause { gens: &t.generics, indent: 0, end_newline: true },
+        bounds = bounds(&t.bounds, false)
+    );
 
     document(w, cx, it);
 
@@ -3595,15 +3855,17 @@ fn item_opaque_ty(
     render_assoc_items(w, cx, it, it.def_id, AssocItemRender::All)
 }
 
-fn item_trait_alias(w: &mut Buffer, cx: &Context, it: &clean::Item,
-                    t: &clean::TraitAlias) {
+fn item_trait_alias(w: &mut Buffer, cx: &Context, it: &clean::Item, t: &clean::TraitAlias) {
     write!(w, "<pre class='rust trait-alias'>");
     render_attributes(w, it, false);
-    write!(w, "trait {}{}{} = {};</pre>",
-           it.name.as_ref().unwrap(),
-           t.generics.print(),
-           WhereClause { gens: &t.generics, indent: 0, end_newline: true },
-           bounds(&t.bounds, true));
+    write!(
+        w,
+        "trait {}{}{} = {};</pre>",
+        it.name.as_ref().unwrap(),
+        t.generics.print(),
+        WhereClause { gens: &t.generics, indent: 0, end_newline: true },
+        bounds(&t.bounds, true)
+    );
 
     document(w, cx, it);
 
@@ -3617,11 +3879,14 @@ fn item_trait_alias(w: &mut Buffer, cx: &Context, it: &clean::Item,
 fn item_typedef(w: &mut Buffer, cx: &Context, it: &clean::Item, t: &clean::Typedef) {
     write!(w, "<pre class='rust typedef'>");
     render_attributes(w, it, false);
-    write!(w, "type {}{}{where_clause} = {type_};</pre>",
-           it.name.as_ref().unwrap(),
-           t.generics.print(),
-           where_clause = WhereClause { gens: &t.generics, indent: 0, end_newline: true },
-           type_ = t.type_.print());
+    write!(
+        w,
+        "type {}{}{where_clause} = {type_};</pre>",
+        it.name.as_ref().unwrap(),
+        t.generics.print(),
+        where_clause = WhereClause { gens: &t.generics, indent: 0, end_newline: true },
+        type_ = t.type_.print()
+    );
 
     document(w, cx, it);
 
@@ -3648,11 +3913,19 @@ fn item_foreign_type(w: &mut Buffer, cx: &Context, it: &clean::Item) {
 }
 
 fn print_sidebar(cx: &Context, it: &clean::Item, buffer: &mut Buffer) {
-    let parentlen = cx.current.len() - if it.is_mod() {1} else {0};
-
-    if it.is_struct() || it.is_trait() || it.is_primitive() || it.is_union()
-        || it.is_enum() || it.is_mod() || it.is_typedef() {
-        write!(buffer, "<p class='location'>{}{}</p>",
+    let parentlen = cx.current.len() - if it.is_mod() { 1 } else { 0 };
+
+    if it.is_struct()
+        || it.is_trait()
+        || it.is_primitive()
+        || it.is_union()
+        || it.is_enum()
+        || it.is_mod()
+        || it.is_typedef()
+    {
+        write!(
+            buffer,
+            "<p class='location'>{}{}</p>",
             match it.inner {
                 clean::StructItem(..) => "Struct ",
                 clean::TraitItem(..) => "Trait ",
@@ -3661,30 +3934,37 @@ fn print_sidebar(cx: &Context, it: &clean::Item, buffer: &mut Buffer) {
                 clean::EnumItem(..) => "Enum ",
                 clean::TypedefItem(..) => "Type Definition ",
                 clean::ForeignTypeItem => "Foreign Type ",
-                clean::ModuleItem(..) => if it.is_crate() {
-                    "Crate "
-                } else {
-                    "Module "
-                },
+                clean::ModuleItem(..) =>
+                    if it.is_crate() {
+                        "Crate "
+                    } else {
+                        "Module "
+                    },
                 _ => "",
             },
-            it.name.as_ref().unwrap());
+            it.name.as_ref().unwrap()
+        );
     }
 
     if it.is_crate() {
         if let Some(ref version) = cx.cache.crate_version {
-            write!(buffer,
-                    "<div class='block version'>\
+            write!(
+                buffer,
+                "<div class='block version'>\
                     <p>Version {}</p>\
                     </div>",
-                    version);
+                version
+            );
         }
     }
 
     write!(buffer, "<div class=\"sidebar-elems\">");
     if it.is_crate() {
-        write!(buffer, "<a id='all-types' href='all.html'><p>See all {}'s items</p></a>",
-                it.name.as_ref().expect("crates always have a name"));
+        write!(
+            buffer,
+            "<a id='all-types' href='all.html'><p>See all {}'s items</p></a>",
+            it.name.as_ref().expect("crates always have a name")
+        );
     }
     match it.inner {
         clean::StructItem(ref s) => sidebar_struct(buffer, it, s),
@@ -3711,29 +3991,33 @@ fn print_sidebar(cx: &Context, it: &clean::Item, buffer: &mut Buffer) {
         if i > 0 {
             write!(buffer, "::<wbr>");
         }
-        write!(buffer, "<a href='{}index.html'>{}</a>",
-                &cx.root_path()[..(cx.current.len() - i - 1) * 3],
-                *name);
+        write!(
+            buffer,
+            "<a href='{}index.html'>{}</a>",
+            &cx.root_path()[..(cx.current.len() - i - 1) * 3],
+            *name
+        );
     }
     write!(buffer, "</p>");
 
     // Sidebar refers to the enclosing module, not this module.
     let relpath = if it.is_mod() { "../" } else { "" };
-    write!(buffer,
-            "<script>window.sidebarCurrent = {{\
+    write!(
+        buffer,
+        "<script>window.sidebarCurrent = {{\
                 name: '{name}', \
                 ty: '{ty}', \
                 relpath: '{path}'\
             }};</script>",
-            name = it.name.as_ref().map(|x| &x[..]).unwrap_or(""),
-            ty = it.type_(),
-            path = relpath);
+        name = it.name.as_ref().map(|x| &x[..]).unwrap_or(""),
+        ty = it.type_(),
+        path = relpath
+    );
     if parentlen == 0 {
         // There is no sidebar-items.js beyond the crate root path
         // FIXME maybe dynamic crate loading can be merged here
     } else {
-        write!(buffer, "<script defer src=\"{path}sidebar-items.js\"></script>",
-                path = relpath);
+        write!(buffer, "<script defer src=\"{path}sidebar-items.js\"></script>", path = relpath);
     }
     // Closes sidebar-elems div.
     write!(buffer, "</div>");
@@ -3756,36 +4040,39 @@ fn get_methods(
     used_links: &mut FxHashSet<String>,
     deref_mut: bool,
 ) -> Vec<String> {
-    i.items.iter().filter_map(|item| {
-        match item.name {
+    i.items
+        .iter()
+        .filter_map(|item| match item.name {
             Some(ref name) if !name.is_empty() && item.is_method() => {
                 if !for_deref || should_render_item(item, deref_mut) {
-                    Some(format!("<a href=\"#{}\">{}</a>",
-                                 get_next_url(used_links, format!("method.{}", name)),
-                                 name))
+                    Some(format!(
+                        "<a href=\"#{}\">{}</a>",
+                        get_next_url(used_links, format!("method.{}", name)),
+                        name
+                    ))
                 } else {
                     None
                 }
             }
             _ => None,
-        }
-    }).collect::<Vec<_>>()
+        })
+        .collect::<Vec<_>>()
 }
 
 // The point is to url encode any potential character from a type with genericity.
 fn small_url_encode(s: &str) -> String {
     s.replace("<", "%3C")
-     .replace(">", "%3E")
-     .replace(" ", "%20")
-     .replace("?", "%3F")
-     .replace("'", "%27")
-     .replace("&", "%26")
-     .replace(",", "%2C")
-     .replace(":", "%3A")
-     .replace(";", "%3B")
-     .replace("[", "%5B")
-     .replace("]", "%5D")
-     .replace("\"", "%22")
+        .replace(">", "%3E")
+        .replace(" ", "%20")
+        .replace("?", "%3F")
+        .replace("'", "%27")
+        .replace("&", "%26")
+        .replace(",", "%2C")
+        .replace(":", "%3A")
+        .replace(";", "%3B")
+        .replace("[", "%5B")
+        .replace("]", "%5D")
+        .replace("\"", "%22")
 }
 
 fn sidebar_assoc_items(it: &clean::Item) -> String {
@@ -3796,53 +4083,67 @@ fn sidebar_assoc_items(it: &clean::Item) -> String {
 
         {
             let used_links_bor = &mut used_links;
-            let mut ret = v.iter()
-                           .filter(|i| i.inner_impl().trait_.is_none())
-                           .flat_map(move |i| get_methods(i.inner_impl(),
-                                                          false,
-                                                          used_links_bor, false))
-                           .collect::<Vec<_>>();
+            let mut ret = v
+                .iter()
+                .filter(|i| i.inner_impl().trait_.is_none())
+                .flat_map(move |i| get_methods(i.inner_impl(), false, used_links_bor, false))
+                .collect::<Vec<_>>();
             // We want links' order to be reproducible so we don't use unstable sort.
             ret.sort();
             if !ret.is_empty() {
-                out.push_str(&format!("<a class=\"sidebar-title\" href=\"#methods\">Methods\
-                                       </a><div class=\"sidebar-links\">{}</div>", ret.join("")));
+                out.push_str(&format!(
+                    "<a class=\"sidebar-title\" href=\"#methods\">Methods\
+                                       </a><div class=\"sidebar-links\">{}</div>",
+                    ret.join("")
+                ));
             }
         }
 
         if v.iter().any(|i| i.inner_impl().trait_.is_some()) {
-            if let Some(impl_) = v.iter()
-                                  .filter(|i| i.inner_impl().trait_.is_some())
-                                  .find(|i| i.inner_impl().trait_.def_id() == c.deref_trait_did) {
-                if let Some(target) = impl_.inner_impl().items.iter().filter_map(|item| {
-                    match item.inner {
+            if let Some(impl_) = v
+                .iter()
+                .filter(|i| i.inner_impl().trait_.is_some())
+                .find(|i| i.inner_impl().trait_.def_id() == c.deref_trait_did)
+            {
+                if let Some(target) = impl_
+                    .inner_impl()
+                    .items
+                    .iter()
+                    .filter_map(|item| match item.inner {
                         clean::TypedefItem(ref t, true) => Some(&t.type_),
                         _ => None,
-                    }
-                }).next() {
-                    let inner_impl = target.def_id().or(target.primitive_type().and_then(|prim| {
-                        c.primitive_locations.get(&prim).cloned()
-                    })).and_then(|did| c.impls.get(&did));
+                    })
+                    .next()
+                {
+                    let inner_impl = target
+                        .def_id()
+                        .or(target
+                            .primitive_type()
+                            .and_then(|prim| c.primitive_locations.get(&prim).cloned()))
+                        .and_then(|did| c.impls.get(&did));
                     if let Some(impls) = inner_impl {
                         out.push_str("<a class=\"sidebar-title\" href=\"#deref-methods\">");
-                        out.push_str(&format!("Methods from {}&lt;Target={}&gt;",
+                        out.push_str(&format!(
+                            "Methods from {}&lt;Target={}&gt;",
                             Escape(&format!(
-                                "{:#}", impl_.inner_impl().trait_.as_ref().unwrap().print()
+                                "{:#}",
+                                impl_.inner_impl().trait_.as_ref().unwrap().print()
                             )),
-                            Escape(&format!("{:#}", target.print()))));
+                            Escape(&format!("{:#}", target.print()))
+                        ));
                         out.push_str("</a>");
-                        let mut ret = impls.iter()
-                                           .filter(|i| i.inner_impl().trait_.is_none())
-                                           .flat_map(|i| get_methods(i.inner_impl(),
-                                                                     true,
-                                                                     &mut used_links,
-                                                                     true))
-                                           .collect::<Vec<_>>();
+                        let mut ret = impls
+                            .iter()
+                            .filter(|i| i.inner_impl().trait_.is_none())
+                            .flat_map(|i| get_methods(i.inner_impl(), true, &mut used_links, true))
+                            .collect::<Vec<_>>();
                         // We want links' order to be reproducible so we don't use unstable sort.
                         ret.sort();
                         if !ret.is_empty() {
-                            out.push_str(&format!("<div class=\"sidebar-links\">{}</div>",
-                                                  ret.join("")));
+                            out.push_str(&format!(
+                                "<div class=\"sidebar-links\">{}</div>",
+                                ret.join("")
+                            ));
                         }
                     }
                 }
@@ -3850,22 +4151,21 @@ fn sidebar_assoc_items(it: &clean::Item) -> String {
             let format_impls = |impls: Vec<&Impl>| {
                 let mut links = FxHashSet::default();
 
-                let mut ret = impls.iter()
+                let mut ret = impls
+                    .iter()
                     .filter_map(|i| {
                         let is_negative_impl = is_negative_impl(i.inner_impl());
                         if let Some(ref i) = i.inner_impl().trait_ {
                             let i_display = format!("{:#}", i.print());
                             let out = Escape(&i_display);
                             let encoded = small_url_encode(&format!("{:#}", i.print()));
-                            let generated = format!("<a href=\"#impl-{}\">{}{}</a>",
-                                                    encoded,
-                                                    if is_negative_impl { "!" } else { "" },
-                                                    out);
-                            if links.insert(generated.clone()) {
-                                Some(generated)
-                            } else {
-                                None
-                            }
+                            let generated = format!(
+                                "<a href=\"#impl-{}\">{}{}</a>",
+                                encoded,
+                                if is_negative_impl { "!" } else { "" },
+                                out
+                            );
+                            if links.insert(generated.clone()) { Some(generated) } else { None }
                         } else {
                             None
                         }
@@ -3875,9 +4175,8 @@ fn sidebar_assoc_items(it: &clean::Item) -> String {
                 ret.join("")
             };
 
-            let (synthetic, concrete): (Vec<&Impl>, Vec<&Impl>) = v
-                .iter()
-                .partition::<Vec<_>, _>(|i| i.inner_impl().synthetic);
+            let (synthetic, concrete): (Vec<&Impl>, Vec<&Impl>) =
+                v.iter().partition::<Vec<_>, _>(|i| i.inner_impl().synthetic);
             let (blanket_impl, concrete): (Vec<&Impl>, Vec<&Impl>) = concrete
                 .into_iter()
                 .partition::<Vec<_>, _>(|i| i.inner_impl().blanket_impl.is_some());
@@ -3887,20 +4186,26 @@ fn sidebar_assoc_items(it: &clean::Item) -> String {
             let blanket_format = format_impls(blanket_impl);
 
             if !concrete_format.is_empty() {
-                out.push_str("<a class=\"sidebar-title\" href=\"#implementations\">\
-                              Trait Implementations</a>");
+                out.push_str(
+                    "<a class=\"sidebar-title\" href=\"#implementations\">\
+                              Trait Implementations</a>",
+                );
                 out.push_str(&format!("<div class=\"sidebar-links\">{}</div>", concrete_format));
             }
 
             if !synthetic_format.is_empty() {
-                out.push_str("<a class=\"sidebar-title\" href=\"#synthetic-implementations\">\
-                              Auto Trait Implementations</a>");
+                out.push_str(
+                    "<a class=\"sidebar-title\" href=\"#synthetic-implementations\">\
+                              Auto Trait Implementations</a>",
+                );
                 out.push_str(&format!("<div class=\"sidebar-links\">{}</div>", synthetic_format));
             }
 
             if !blanket_format.is_empty() {
-                out.push_str("<a class=\"sidebar-title\" href=\"#blanket-implementations\">\
-                              Blanket Implementations</a>");
+                out.push_str(
+                    "<a class=\"sidebar-title\" href=\"#blanket-implementations\">\
+                              Blanket Implementations</a>",
+                );
                 out.push_str(&format!("<div class=\"sidebar-links\">{}</div>", blanket_format));
             }
         }
@@ -3915,8 +4220,11 @@ fn sidebar_struct(buf: &mut Buffer, it: &clean::Item, s: &clean::Struct) {
 
     if !fields.is_empty() {
         if let doctree::Plain = s.struct_type {
-            sidebar.push_str(&format!("<a class=\"sidebar-title\" href=\"#fields\">Fields</a>\
-                                       <div class=\"sidebar-links\">{}</div>", fields));
+            sidebar.push_str(&format!(
+                "<a class=\"sidebar-title\" href=\"#fields\">Fields</a>\
+                                       <div class=\"sidebar-links\">{}</div>",
+                fields
+            ));
         }
     }
 
@@ -3942,7 +4250,7 @@ fn extract_for_impl_name(item: &clean::Item) -> Option<(String, String)> {
             } else {
                 None
             }
-        },
+        }
         _ => None,
     }
 }
@@ -3954,107 +4262,108 @@ fn is_negative_impl(i: &clean::Impl) -> bool {
 fn sidebar_trait(buf: &mut Buffer, it: &clean::Item, t: &clean::Trait) {
     let mut sidebar = String::new();
 
-    let types = t.items
-                 .iter()
-                 .filter_map(|m| {
-                     match m.name {
-                         Some(ref name) if m.is_associated_type() => {
-                             Some(format!("<a href=\"#associatedtype.{name}\">{name}</a>",
-                                          name=name))
-                         }
-                         _ => None,
-                     }
-                 })
-                 .collect::<String>();
-    let consts = t.items
-                  .iter()
-                  .filter_map(|m| {
-                      match m.name {
-                          Some(ref name) if m.is_associated_const() => {
-                              Some(format!("<a href=\"#associatedconstant.{name}\">{name}</a>",
-                                           name=name))
-                          }
-                          _ => None,
-                      }
-                  })
-                  .collect::<String>();
-    let mut required = t.items
-                        .iter()
-                        .filter_map(|m| {
-                            match m.name {
-                                Some(ref name) if m.is_ty_method() => {
-                                    Some(format!("<a href=\"#tymethod.{name}\">{name}</a>",
-                                                 name=name))
-                                }
-                                _ => None,
-                            }
-                        })
-                        .collect::<Vec<String>>();
-    let mut provided = t.items
-                        .iter()
-                        .filter_map(|m| {
-                            match m.name {
-                                Some(ref name) if m.is_method() => {
-                                    Some(format!("<a href=\"#method.{0}\">{0}</a>", name))
-                                }
-                                _ => None,
-                            }
-                        })
-                        .collect::<Vec<String>>();
+    let types = t
+        .items
+        .iter()
+        .filter_map(|m| match m.name {
+            Some(ref name) if m.is_associated_type() => {
+                Some(format!("<a href=\"#associatedtype.{name}\">{name}</a>", name = name))
+            }
+            _ => None,
+        })
+        .collect::<String>();
+    let consts = t
+        .items
+        .iter()
+        .filter_map(|m| match m.name {
+            Some(ref name) if m.is_associated_const() => {
+                Some(format!("<a href=\"#associatedconstant.{name}\">{name}</a>", name = name))
+            }
+            _ => None,
+        })
+        .collect::<String>();
+    let mut required = t
+        .items
+        .iter()
+        .filter_map(|m| match m.name {
+            Some(ref name) if m.is_ty_method() => {
+                Some(format!("<a href=\"#tymethod.{name}\">{name}</a>", name = name))
+            }
+            _ => None,
+        })
+        .collect::<Vec<String>>();
+    let mut provided = t
+        .items
+        .iter()
+        .filter_map(|m| match m.name {
+            Some(ref name) if m.is_method() => {
+                Some(format!("<a href=\"#method.{0}\">{0}</a>", name))
+            }
+            _ => None,
+        })
+        .collect::<Vec<String>>();
 
     if !types.is_empty() {
-        sidebar.push_str(&format!("<a class=\"sidebar-title\" href=\"#associated-types\">\
+        sidebar.push_str(&format!(
+            "<a class=\"sidebar-title\" href=\"#associated-types\">\
                                    Associated Types</a><div class=\"sidebar-links\">{}</div>",
-                                  types));
+            types
+        ));
     }
     if !consts.is_empty() {
-        sidebar.push_str(&format!("<a class=\"sidebar-title\" href=\"#associated-const\">\
+        sidebar.push_str(&format!(
+            "<a class=\"sidebar-title\" href=\"#associated-const\">\
                                    Associated Constants</a><div class=\"sidebar-links\">{}</div>",
-                                  consts));
+            consts
+        ));
     }
     if !required.is_empty() {
         required.sort();
-        sidebar.push_str(&format!("<a class=\"sidebar-title\" href=\"#required-methods\">\
+        sidebar.push_str(&format!(
+            "<a class=\"sidebar-title\" href=\"#required-methods\">\
                                    Required Methods</a><div class=\"sidebar-links\">{}</div>",
-                                  required.join("")));
+            required.join("")
+        ));
     }
     if !provided.is_empty() {
         provided.sort();
-        sidebar.push_str(&format!("<a class=\"sidebar-title\" href=\"#provided-methods\">\
+        sidebar.push_str(&format!(
+            "<a class=\"sidebar-title\" href=\"#provided-methods\">\
                                    Provided Methods</a><div class=\"sidebar-links\">{}</div>",
-                                  provided.join("")));
+            provided.join("")
+        ));
     }
 
     let c = cache();
 
     if let Some(implementors) = c.implementors.get(&it.def_id) {
-        let mut res = implementors.iter()
-                                  .filter(|i| i.inner_impl().for_.def_id()
-                                  .map_or(false, |d| !c.paths.contains_key(&d)))
-                                  .filter_map(|i| {
-                                      match extract_for_impl_name(&i.impl_item) {
-                                          Some((ref name, ref id)) => {
-                                              Some(format!("<a href=\"#{}\">{}</a>",
-                                                          id,
-                                                          Escape(name)))
-                                          }
-                                          _ => None,
-                                      }
-                                  })
-                                  .collect::<Vec<String>>();
+        let mut res = implementors
+            .iter()
+            .filter(|i| i.inner_impl().for_.def_id().map_or(false, |d| !c.paths.contains_key(&d)))
+            .filter_map(|i| match extract_for_impl_name(&i.impl_item) {
+                Some((ref name, ref id)) => {
+                    Some(format!("<a href=\"#{}\">{}</a>", id, Escape(name)))
+                }
+                _ => None,
+            })
+            .collect::<Vec<String>>();
         if !res.is_empty() {
             res.sort();
-            sidebar.push_str(&format!("<a class=\"sidebar-title\" href=\"#foreign-impls\">\
+            sidebar.push_str(&format!(
+                "<a class=\"sidebar-title\" href=\"#foreign-impls\">\
                                        Implementations on Foreign Types</a><div \
                                        class=\"sidebar-links\">{}</div>",
-                                      res.join("")));
+                res.join("")
+            ));
         }
     }
 
     sidebar.push_str("<a class=\"sidebar-title\" href=\"#implementors\">Implementors</a>");
     if t.auto {
-        sidebar.push_str("<a class=\"sidebar-title\" \
-                          href=\"#synthetic-implementors\">Auto Implementors</a>");
+        sidebar.push_str(
+            "<a class=\"sidebar-title\" \
+                          href=\"#synthetic-implementors\">Auto Implementors</a>",
+        );
     }
 
     sidebar.push_str(&sidebar_assoc_items(it));
@@ -4079,18 +4388,18 @@ fn sidebar_typedef(buf: &mut Buffer, it: &clean::Item) {
 }
 
 fn get_struct_fields_name(fields: &[clean::Item]) -> String {
-    fields.iter()
-          .filter(|f| if let clean::StructFieldItem(..) = f.inner {
-              true
-          } else {
-              false
-          })
-          .filter_map(|f| match f.name {
-              Some(ref name) => Some(format!("<a href=\"#structfield.{name}\">\
-                                              {name}</a>", name=name)),
-              _ => None,
-          })
-          .collect()
+    fields
+        .iter()
+        .filter(|f| if let clean::StructFieldItem(..) = f.inner { true } else { false })
+        .filter_map(|f| match f.name {
+            Some(ref name) => Some(format!(
+                "<a href=\"#structfield.{name}\">\
+                                              {name}</a>",
+                name = name
+            )),
+            _ => None,
+        })
+        .collect()
 }
 
 fn sidebar_union(buf: &mut Buffer, it: &clean::Item, u: &clean::Union) {
@@ -4098,8 +4407,11 @@ fn sidebar_union(buf: &mut Buffer, it: &clean::Item, u: &clean::Union) {
     let fields = get_struct_fields_name(&u.fields);
 
     if !fields.is_empty() {
-        sidebar.push_str(&format!("<a class=\"sidebar-title\" href=\"#fields\">Fields</a>\
-                                   <div class=\"sidebar-links\">{}</div>", fields));
+        sidebar.push_str(&format!(
+            "<a class=\"sidebar-title\" href=\"#fields\">Fields</a>\
+                                   <div class=\"sidebar-links\">{}</div>",
+            fields
+        ));
     }
 
     sidebar.push_str(&sidebar_assoc_items(it));
@@ -4112,16 +4424,24 @@ fn sidebar_union(buf: &mut Buffer, it: &clean::Item, u: &clean::Union) {
 fn sidebar_enum(buf: &mut Buffer, it: &clean::Item, e: &clean::Enum) {
     let mut sidebar = String::new();
 
-    let variants = e.variants.iter()
-                             .filter_map(|v| match v.name {
-                                 Some(ref name) => Some(format!("<a href=\"#variant.{name}\">{name}\
-                                                                 </a>", name = name)),
-                                 _ => None,
-                             })
-                             .collect::<String>();
+    let variants = e
+        .variants
+        .iter()
+        .filter_map(|v| match v.name {
+            Some(ref name) => Some(format!(
+                "<a href=\"#variant.{name}\">{name}\
+                                                                 </a>",
+                name = name
+            )),
+            _ => None,
+        })
+        .collect::<String>();
     if !variants.is_empty() {
-        sidebar.push_str(&format!("<a class=\"sidebar-title\" href=\"#variants\">Variants</a>\
-                                   <div class=\"sidebar-links\">{}</div>", variants));
+        sidebar.push_str(&format!(
+            "<a class=\"sidebar-title\" href=\"#variants\">Variants</a>\
+                                   <div class=\"sidebar-links\">{}</div>",
+            variants
+        ));
     }
 
     sidebar.push_str(&sidebar_assoc_items(it));
@@ -4133,58 +4453,77 @@ fn sidebar_enum(buf: &mut Buffer, it: &clean::Item, e: &clean::Enum) {
 
 fn item_ty_to_strs(ty: &ItemType) -> (&'static str, &'static str) {
     match *ty {
-        ItemType::ExternCrate |
-        ItemType::Import          => ("reexports", "Re-exports"),
-        ItemType::Module          => ("modules", "Modules"),
-        ItemType::Struct          => ("structs", "Structs"),
-        ItemType::Union           => ("unions", "Unions"),
-        ItemType::Enum            => ("enums", "Enums"),
-        ItemType::Function        => ("functions", "Functions"),
-        ItemType::Typedef         => ("types", "Type Definitions"),
-        ItemType::Static          => ("statics", "Statics"),
-        ItemType::Constant        => ("constants", "Constants"),
-        ItemType::Trait           => ("traits", "Traits"),
-        ItemType::Impl            => ("impls", "Implementations"),
-        ItemType::TyMethod        => ("tymethods", "Type Methods"),
-        ItemType::Method          => ("methods", "Methods"),
-        ItemType::StructField     => ("fields", "Struct Fields"),
-        ItemType::Variant         => ("variants", "Variants"),
-        ItemType::Macro           => ("macros", "Macros"),
-        ItemType::Primitive       => ("primitives", "Primitive Types"),
-        ItemType::AssocType       => ("associated-types", "Associated Types"),
-        ItemType::AssocConst      => ("associated-consts", "Associated Constants"),
-        ItemType::ForeignType     => ("foreign-types", "Foreign Types"),
-        ItemType::Keyword         => ("keywords", "Keywords"),
-        ItemType::OpaqueTy        => ("opaque-types", "Opaque Types"),
-        ItemType::ProcAttribute   => ("attributes", "Attribute Macros"),
-        ItemType::ProcDerive      => ("derives", "Derive Macros"),
-        ItemType::TraitAlias      => ("trait-aliases", "Trait aliases"),
+        ItemType::ExternCrate | ItemType::Import => ("reexports", "Re-exports"),
+        ItemType::Module => ("modules", "Modules"),
+        ItemType::Struct => ("structs", "Structs"),
+        ItemType::Union => ("unions", "Unions"),
+        ItemType::Enum => ("enums", "Enums"),
+        ItemType::Function => ("functions", "Functions"),
+        ItemType::Typedef => ("types", "Type Definitions"),
+        ItemType::Static => ("statics", "Statics"),
+        ItemType::Constant => ("constants", "Constants"),
+        ItemType::Trait => ("traits", "Traits"),
+        ItemType::Impl => ("impls", "Implementations"),
+        ItemType::TyMethod => ("tymethods", "Type Methods"),
+        ItemType::Method => ("methods", "Methods"),
+        ItemType::StructField => ("fields", "Struct Fields"),
+        ItemType::Variant => ("variants", "Variants"),
+        ItemType::Macro => ("macros", "Macros"),
+        ItemType::Primitive => ("primitives", "Primitive Types"),
+        ItemType::AssocType => ("associated-types", "Associated Types"),
+        ItemType::AssocConst => ("associated-consts", "Associated Constants"),
+        ItemType::ForeignType => ("foreign-types", "Foreign Types"),
+        ItemType::Keyword => ("keywords", "Keywords"),
+        ItemType::OpaqueTy => ("opaque-types", "Opaque Types"),
+        ItemType::ProcAttribute => ("attributes", "Attribute Macros"),
+        ItemType::ProcDerive => ("derives", "Derive Macros"),
+        ItemType::TraitAlias => ("trait-aliases", "Trait aliases"),
     }
 }
 
 fn sidebar_module(buf: &mut Buffer, items: &[clean::Item]) {
     let mut sidebar = String::new();
 
-    if items.iter().any(|it| it.type_() == ItemType::ExternCrate ||
-                             it.type_() == ItemType::Import) {
-        sidebar.push_str(&format!("<li><a href=\"#{id}\">{name}</a></li>",
-                                  id = "reexports",
-                                  name = "Re-exports"));
+    if items.iter().any(|it| it.type_() == ItemType::ExternCrate || it.type_() == ItemType::Import)
+    {
+        sidebar.push_str(&format!(
+            "<li><a href=\"#{id}\">{name}</a></li>",
+            id = "reexports",
+            name = "Re-exports"
+        ));
     }
 
     // ordering taken from item_module, reorder, where it prioritized elements in a certain order
     // to print its headings
-    for &myty in &[ItemType::Primitive, ItemType::Module, ItemType::Macro, ItemType::Struct,
-                   ItemType::Enum, ItemType::Constant, ItemType::Static, ItemType::Trait,
-                   ItemType::Function, ItemType::Typedef, ItemType::Union, ItemType::Impl,
-                   ItemType::TyMethod, ItemType::Method, ItemType::StructField, ItemType::Variant,
-                   ItemType::AssocType, ItemType::AssocConst, ItemType::ForeignType,
-                   ItemType::Keyword] {
+    for &myty in &[
+        ItemType::Primitive,
+        ItemType::Module,
+        ItemType::Macro,
+        ItemType::Struct,
+        ItemType::Enum,
+        ItemType::Constant,
+        ItemType::Static,
+        ItemType::Trait,
+        ItemType::Function,
+        ItemType::Typedef,
+        ItemType::Union,
+        ItemType::Impl,
+        ItemType::TyMethod,
+        ItemType::Method,
+        ItemType::StructField,
+        ItemType::Variant,
+        ItemType::AssocType,
+        ItemType::AssocConst,
+        ItemType::ForeignType,
+        ItemType::Keyword,
+    ] {
         if items.iter().any(|it| !it.is_stripped() && it.type_() == myty) {
             let (short, name) = item_ty_to_strs(&myty);
-            sidebar.push_str(&format!("<li><a href=\"#{id}\">{name}</a></li>",
-                                      id = short,
-                                      name = name));
+            sidebar.push_str(&format!(
+                "<li><a href=\"#{id}\">{name}</a></li>",
+                id = short,
+                name = name
+            ));
         }
     }
 
@@ -4202,10 +4541,7 @@ fn sidebar_foreign_type(buf: &mut Buffer, it: &clean::Item) {
 
 fn item_macro(w: &mut Buffer, cx: &Context, it: &clean::Item, t: &clean::Macro) {
     wrap_into_docblock(w, |w| {
-        w.write_str(&highlight::render_with_highlighting(&t.source,
-                                                         Some("macro"),
-                                                         None,
-                                                         None))
+        w.write_str(&highlight::render_with_highlighting(&t.source, Some("macro"), None, None))
     });
     document(w, cx, it)
 }
@@ -4282,33 +4618,32 @@ fn collect_paths_for_type(first_ty: clean::Type) -> Vec<String> {
                 match fqp {
                     Some(path) => {
                         out.push(path.join("::"));
-                    },
+                    }
                     _ => {}
                 };
-
-            },
+            }
             clean::Type::Tuple(tys) => {
                 work.extend(tys.into_iter());
-            },
+            }
             clean::Type::Slice(ty) => {
                 work.push_back(*ty);
             }
             clean::Type::Array(ty, _) => {
                 work.push_back(*ty);
-            },
+            }
             clean::Type::RawPointer(_, ty) => {
                 work.push_back(*ty);
-            },
+            }
             clean::Type::BorrowedRef { type_, .. } => {
                 work.push_back(*type_);
-            },
+            }
             clean::Type::QPath { self_type, trait_, .. } => {
                 work.push_back(*self_type);
                 work.push_back(*trait_);
-            },
+            }
             _ => {}
         }
-    };
+    }
     out
 }