Auto merge of #32778 - steveklabnik:rollup, r=steveklabnik

Rollup of 12 pull requests

- Successful merges: #31762, #32538, #32634, #32668, #32679, #32691, #32724, #32727, #32744, #32761, #32766, #32774
- Failed merges:

4 files changed, 18 insertions, 20 deletions

diff --git a/src/libstd/collections/hash/map.rs b/src/libstd/collections/hash/map.rs
index 4c29023660a..234042ab011 100644
--- a/src/libstd/collections/hash/map.rs
+++ b/src/libstd/collections/hash/map.rs
@@ -428,10 +428,7 @@ fn robin_hood<'a, K: 'a, V: 'a>(bucket: FullBucketMut<'a, K, V>,
                         mut val: V)
                         -> &'a mut V {
     let starting_index = bucket.index();
-    let size = {
-        let table = bucket.table(); // FIXME "lifetime too short".
-        table.size()
-    };
+    let size = bucket.table().size();
     // Save the *starting point*.
     let mut bucket = bucket.stash();
     // There can be at most `size - dib` buckets to displace, because
@@ -744,10 +741,9 @@ impl<K, V, S> HashMap<K, V, S>
                     let h = bucket.hash();
                     let (b, k, v) = bucket.take();
                     self.insert_hashed_ordered(h, k, v);
-                    {
-                        let t = b.table(); // FIXME "lifetime too short".
-                        if t.size() == 0 { break }
-                    };
+                    if b.table().size() == 0 {
+                        break;
+                    }
                     b.into_bucket()
                 }
                 Empty(b) => b.into_bucket()
diff --git a/src/libstd/env.rs b/src/libstd/env.rs
index 40f6528f63e..9dc6a26cdee 100644
--- a/src/libstd/env.rs
+++ b/src/libstd/env.rs
@@ -181,7 +181,7 @@ fn _var(key: &OsStr) -> Result<String, VarError> {
 }
 
 /// Fetches the environment variable `key` from the current process, returning
-/// None if the variable isn't set.
+/// `None` if the variable isn't set.
 ///
 /// # Examples
 ///
@@ -617,7 +617,7 @@ pub mod consts {
     #[stable(feature = "env", since = "1.0.0")]
     pub const ARCH: &'static str = super::arch::ARCH;
 
-    /// The family of the operating system. In this case, `unix`.
+    /// The family of the operating system. Example value is `unix`.
     ///
     /// Some possible values:
     ///
@@ -626,8 +626,8 @@ pub mod consts {
     #[stable(feature = "env", since = "1.0.0")]
     pub const FAMILY: &'static str = super::os::FAMILY;
 
-    /// A string describing the specific operating system in use: in this
-    /// case, `linux`.
+    /// A string describing the specific operating system in use.
+    /// Example value is `linux`.
     ///
     /// Some possible values:
     ///
@@ -646,7 +646,7 @@ pub mod consts {
     pub const OS: &'static str = super::os::OS;
 
     /// Specifies the filename prefix used for shared libraries on this
-    /// platform: in this case, `lib`.
+    /// platform. Example value is `lib`.
     ///
     /// Some possible values:
     ///
@@ -656,7 +656,7 @@ pub mod consts {
     pub const DLL_PREFIX: &'static str = super::os::DLL_PREFIX;
 
     /// Specifies the filename suffix used for shared libraries on this
-    /// platform: in this case, `.so`.
+    /// platform. Example value is `.so`.
     ///
     /// Some possible values:
     ///
@@ -667,7 +667,7 @@ pub mod consts {
     pub const DLL_SUFFIX: &'static str = super::os::DLL_SUFFIX;
 
     /// Specifies the file extension used for shared libraries on this
-    /// platform that goes after the dot: in this case, `so`.
+    /// platform that goes after the dot. Example value is `so`.
     ///
     /// Some possible values:
     ///
@@ -678,7 +678,7 @@ pub mod consts {
     pub const DLL_EXTENSION: &'static str = super::os::DLL_EXTENSION;
 
     /// Specifies the filename suffix used for executable binaries on this
-    /// platform: in this case, the empty string.
+    /// platform. Example value is `.exe`.
     ///
     /// Some possible values:
     ///
@@ -690,7 +690,7 @@ pub mod consts {
     pub const EXE_SUFFIX: &'static str = super::os::EXE_SUFFIX;
 
     /// Specifies the file extension, if any, used for executable binaries
-    /// on this platform: in this case, the empty string.
+    /// on this platform. Example value is `exe`.
     ///
     /// Some possible values:
     ///
diff --git a/src/libstd/fs.rs b/src/libstd/fs.rs
index d8af73816c9..c4d6cb33365 100644
--- a/src/libstd/fs.rs
+++ b/src/libstd/fs.rs
@@ -1708,7 +1708,7 @@ mod tests {
         let tmpdir = tmpdir();
         let dir = &tmpdir.join("fileinfo_false_on_dir");
         check!(fs::create_dir(dir));
-        assert!(dir.is_file() == false);
+        assert!(!dir.is_file());
         check!(fs::remove_dir(dir));
     }
 
diff --git a/src/libstd/primitive_docs.rs b/src/libstd/primitive_docs.rs
index c8ea28c5ca3..e083605a2ac 100644
--- a/src/libstd/primitive_docs.rs
+++ b/src/libstd/primitive_docs.rs
@@ -425,10 +425,11 @@ mod prim_str { }
 ///
 /// # Trait implementations
 ///
-/// If every type inside a tuple implements one of the following
-/// traits, then a tuple itself also implements it.
+/// If every type inside a tuple implements one of the following traits, then a
+/// tuple itself also implements it.
 ///
 /// * [`Clone`]
+/// * [`Copy`]
 /// * [`PartialEq`]
 /// * [`Eq`]
 /// * [`PartialOrd`]
@@ -438,6 +439,7 @@ mod prim_str { }
 /// * [`Hash`]
 ///
 /// [`Clone`]: clone/trait.Clone.html
+/// [`Copy`]: marker/trait.Copy.html
 /// [`PartialEq`]: cmp/trait.PartialEq.html
 /// [`Eq`]: cmp/trait.Eq.html
 /// [`PartialOrd`]: cmp/trait.PartialOrd.html