Format libstd/sys with rustfmt

This commit applies rustfmt with rust-lang/rust's default settings to
files in src/libstd/sys *that are not involved in any currently open PR*
to minimize merge conflicts. THe list of files involved in open PRs was
determined by querying GitHub's GraphQL API with this script:
https://gist.github.com/dtolnay/aa9c34993dc051a4f344d1b10e4487e8

With the list of files from the script in outstanding_files, the
relevant commands were:

    $ find src/libstd/sys -name '*.rs' \
        | xargs rustfmt --edition=2018 --unstable-features --skip-children
    $ rg libstd/sys outstanding_files | xargs git checkout --

Repeating this process several months apart should get us coverage of
most of the rest of the files.

To confirm no funny business:

    $ git checkout $THIS_COMMIT^
    $ git show --pretty= --name-only $THIS_COMMIT \
        | xargs rustfmt --edition=2018 --unstable-features --skip-children
    $ git diff $THIS_COMMIT  # there should be no difference

4 files changed, 6 insertions, 11 deletions

diff --git a/src/libstd/sys/cloudabi/shims/fs.rs b/src/libstd/sys/cloudabi/shims/fs.rs
index 05f91541011..e6160d1457d 100644
--- a/src/libstd/sys/cloudabi/shims/fs.rs
+++ b/src/libstd/sys/cloudabi/shims/fs.rs
@@ -1,7 +1,7 @@
 use crate::ffi::OsString;
 use crate::fmt;
 use crate::hash::{Hash, Hasher};
-use crate::io::{self, SeekFrom, IoSlice, IoSliceMut};
+use crate::io::{self, IoSlice, IoSliceMut, SeekFrom};
 use crate::path::{Path, PathBuf};
 use crate::sys::time::SystemTime;
 use crate::sys::{unsupported, Void};
diff --git a/src/libstd/sys/cloudabi/shims/mod.rs b/src/libstd/sys/cloudabi/shims/mod.rs
index fbb5ff55f22..b1b5f142f45 100644
--- a/src/libstd/sys/cloudabi/shims/mod.rs
+++ b/src/libstd/sys/cloudabi/shims/mod.rs
@@ -4,19 +4,16 @@ pub mod args;
 pub mod env;
 pub mod fs;
 pub mod net;
+pub mod os;
 #[path = "../../unix/path.rs"]
 pub mod path;
 pub mod pipe;
 pub mod process;
-pub mod os;
 
 // This enum is used as the storage for a bunch of types which can't actually exist.
 #[derive(Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Debug, Hash)]
 pub enum Void {}
 
 pub fn unsupported<T>() -> io::Result<T> {
-    Err(io::Error::new(
-        io::ErrorKind::Other,
-        "This function is not available on CloudABI.",
-    ))
+    Err(io::Error::new(io::ErrorKind::Other, "This function is not available on CloudABI."))
 }
diff --git a/src/libstd/sys/cloudabi/shims/net.rs b/src/libstd/sys/cloudabi/shims/net.rs
index 8d609cdfad5..67c436fa795 100644
--- a/src/libstd/sys/cloudabi/shims/net.rs
+++ b/src/libstd/sys/cloudabi/shims/net.rs
@@ -1,9 +1,9 @@
+use crate::convert::TryFrom;
 use crate::fmt;
 use crate::io::{self, IoSlice, IoSliceMut};
 use crate::net::{Ipv4Addr, Ipv6Addr, Shutdown, SocketAddr};
-use crate::time::Duration;
 use crate::sys::{unsupported, Void};
-use crate::convert::TryFrom;
+use crate::time::Duration;
 
 #[allow(unused_extern_crates)]
 pub extern crate libc as netc;
diff --git a/src/libstd/sys/cloudabi/shims/process.rs b/src/libstd/sys/cloudabi/shims/process.rs
index 03a59d6d7c8..4702e5c5492 100644
--- a/src/libstd/sys/cloudabi/shims/process.rs
+++ b/src/libstd/sys/cloudabi/shims/process.rs
@@ -32,9 +32,7 @@ pub enum Stdio {
 
 impl Command {
     pub fn new(_program: &OsStr) -> Command {
-        Command {
-            env: Default::default(),
-        }
+        Command { env: Default::default() }
     }
 
     pub fn arg(&mut self, _arg: &OsStr) {}