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, 114 insertions, 50 deletions

diff --git a/src/libstd/sys/vxworks/ext/fs.rs b/src/libstd/sys/vxworks/ext/fs.rs
index 4a9cc3bd069..9864a855df7 100644
--- a/src/libstd/sys/vxworks/ext/fs.rs
+++ b/src/libstd/sys/vxworks/ext/fs.rs
@@ -2,11 +2,11 @@
 
 use crate::fs::{self, Permissions};
 use crate::io;
-use libc;
 use crate::path::Path;
 use crate::sys;
-use crate::sys_common::{FromInner, AsInner, AsInnerMut};
 use crate::sys::platform::fs::MetadataExt as UnixMetadataExt;
+use crate::sys_common::{AsInner, AsInnerMut, FromInner};
+use libc;
 
 /// Unix-specific extensions to [`File`].
 ///
@@ -112,8 +112,7 @@ pub trait FileExt {
             }
         }
         if !buf.is_empty() {
-            Err(io::Error::new(io::ErrorKind::UnexpectedEof,
-                               "failed to fill whole buffer"))
+            Err(io::Error::new(io::ErrorKind::UnexpectedEof, "failed to fill whole buffer"))
         } else {
             Ok(())
         }
@@ -196,8 +195,12 @@ pub trait FileExt {
     fn write_all_at(&self, mut buf: &[u8], mut offset: u64) -> io::Result<()> {
         while !buf.is_empty() {
             match self.write_at(buf, offset) {
-                Ok(0) => return Err(io::Error::new(io::ErrorKind::WriteZero,
-                                                   "failed to write whole buffer")),
+                Ok(0) => {
+                    return Err(io::Error::new(
+                        io::ErrorKind::WriteZero,
+                        "failed to write whole buffer",
+                    ));
+                }
                 Ok(n) => {
                     buf = &buf[n..];
                     offset += n as u64
@@ -604,20 +607,48 @@ pub trait MetadataExt {
 
 #[stable(feature = "metadata_ext", since = "1.1.0")]
 impl MetadataExt for fs::Metadata {
-    fn dev(&self) -> u64 { self.st_dev() }
-    fn ino(&self) -> u64 { self.st_ino() }
-    fn mode(&self) -> u32 { self.st_mode() }
-    fn nlink(&self) -> u64 { self.st_nlink() }
-    fn uid(&self) -> u32 { self.st_uid() }
-    fn gid(&self) -> u32 { self.st_gid() }
-    fn rdev(&self) -> u64 { self.st_rdev() }
-    fn size(&self) -> u64 { self.st_size() }
-    fn atime(&self) -> i64 { self.st_atime() }
-    fn mtime(&self) -> i64 { self.st_mtime() }
-    fn ctime(&self) -> i64 { self.st_ctime() }
-    fn blksize(&self) -> u64 { self.st_blksize() }
-    fn blocks(&self) -> u64 { self.st_blocks() }
-    fn attrib(&self) -> u8 {self.st_attrib() }
+    fn dev(&self) -> u64 {
+        self.st_dev()
+    }
+    fn ino(&self) -> u64 {
+        self.st_ino()
+    }
+    fn mode(&self) -> u32 {
+        self.st_mode()
+    }
+    fn nlink(&self) -> u64 {
+        self.st_nlink()
+    }
+    fn uid(&self) -> u32 {
+        self.st_uid()
+    }
+    fn gid(&self) -> u32 {
+        self.st_gid()
+    }
+    fn rdev(&self) -> u64 {
+        self.st_rdev()
+    }
+    fn size(&self) -> u64 {
+        self.st_size()
+    }
+    fn atime(&self) -> i64 {
+        self.st_atime()
+    }
+    fn mtime(&self) -> i64 {
+        self.st_mtime()
+    }
+    fn ctime(&self) -> i64 {
+        self.st_ctime()
+    }
+    fn blksize(&self) -> u64 {
+        self.st_blksize()
+    }
+    fn blocks(&self) -> u64 {
+        self.st_blocks()
+    }
+    fn attrib(&self) -> u8 {
+        self.st_attrib()
+    }
 }
 
 /// Unix-specific extensions for [`FileType`].
@@ -704,10 +735,18 @@ pub trait FileTypeExt {
 
 #[stable(feature = "file_type_ext", since = "1.5.0")]
 impl FileTypeExt for fs::FileType {
-    fn is_block_device(&self) -> bool { self.as_inner().is(libc::S_IFBLK) }
-    fn is_char_device(&self) -> bool { self.as_inner().is(libc::S_IFCHR) }
-    fn is_fifo(&self) -> bool { self.as_inner().is(libc::S_IFIFO) }
-    fn is_socket(&self) -> bool { self.as_inner().is(libc::S_IFSOCK) }
+    fn is_block_device(&self) -> bool {
+        self.as_inner().is(libc::S_IFBLK)
+    }
+    fn is_char_device(&self) -> bool {
+        self.as_inner().is(libc::S_IFCHR)
+    }
+    fn is_fifo(&self) -> bool {
+        self.as_inner().is(libc::S_IFIFO)
+    }
+    fn is_socket(&self) -> bool {
+        self.as_inner().is(libc::S_IFSOCK)
+    }
 }
 
 /// Unix-specific extension methods for [`fs::DirEntry`].
@@ -739,7 +778,9 @@ pub trait DirEntryExt {
 
 #[stable(feature = "dir_entry_ext", since = "1.1.0")]
 impl DirEntryExt for fs::DirEntry {
-    fn ino(&self) -> u64 { self.as_inner().ino() }
+    fn ino(&self) -> u64 {
+        self.as_inner().ino()
+    }
 }
 
 /// Creates a new symbolic link on the filesystem.
@@ -766,8 +807,7 @@ impl DirEntryExt for fs::DirEntry {
 /// }
 /// ```
 #[stable(feature = "symlink", since = "1.1.0")]
-pub fn symlink<P: AsRef<Path>, Q: AsRef<Path>>(src: P, dst: Q) -> io::Result<()>
-{
+pub fn symlink<P: AsRef<Path>, Q: AsRef<Path>>(src: P, dst: Q) -> io::Result<()> {
     sys::fs::symlink(src.as_ref(), dst.as_ref())
 }
 
diff --git a/src/libstd/sys/vxworks/ext/io.rs b/src/libstd/sys/vxworks/ext/io.rs
index df6255a3e9e..25c6e26d96e 100644
--- a/src/libstd/sys/vxworks/ext/io.rs
+++ b/src/libstd/sys/vxworks/ext/io.rs
@@ -3,11 +3,11 @@
 #![stable(feature = "rust1", since = "1.0.0")]
 
 use crate::fs;
+use crate::io;
+use crate::net;
 use crate::os::raw;
 use crate::sys;
-use crate::io;
 use crate::sys_common::{self, AsInner, FromInner, IntoInner};
-use crate::net;
 
 /// Raw file descriptors.
 #[stable(feature = "rust1", since = "1.0.0")]
@@ -84,47 +84,65 @@ impl IntoRawFd for fs::File {
 
 #[stable(feature = "asraw_stdio", since = "1.21.0")]
 impl AsRawFd for io::Stdin {
-    fn as_raw_fd(&self) -> RawFd { libc::STDIN_FILENO }
+    fn as_raw_fd(&self) -> RawFd {
+        libc::STDIN_FILENO
+    }
 }
 
 #[stable(feature = "asraw_stdio", since = "1.21.0")]
 impl AsRawFd for io::Stdout {
-    fn as_raw_fd(&self) -> RawFd { libc::STDOUT_FILENO }
+    fn as_raw_fd(&self) -> RawFd {
+        libc::STDOUT_FILENO
+    }
 }
 
 #[stable(feature = "asraw_stdio", since = "1.21.0")]
 impl AsRawFd for io::Stderr {
-    fn as_raw_fd(&self) -> RawFd { libc::STDERR_FILENO }
+    fn as_raw_fd(&self) -> RawFd {
+        libc::STDERR_FILENO
+    }
 }
 
 #[stable(feature = "asraw_stdio_locks", since = "1.35.0")]
 impl<'a> AsRawFd for io::StdinLock<'a> {
-    fn as_raw_fd(&self) -> RawFd { libc::STDIN_FILENO }
+    fn as_raw_fd(&self) -> RawFd {
+        libc::STDIN_FILENO
+    }
 }
 
 #[stable(feature = "asraw_stdio_locks", since = "1.35.0")]
 impl<'a> AsRawFd for io::StdoutLock<'a> {
-    fn as_raw_fd(&self) -> RawFd { libc::STDOUT_FILENO }
+    fn as_raw_fd(&self) -> RawFd {
+        libc::STDOUT_FILENO
+    }
 }
 
 #[stable(feature = "asraw_stdio_locks", since = "1.35.0")]
 impl<'a> AsRawFd for io::StderrLock<'a> {
-    fn as_raw_fd(&self) -> RawFd { libc::STDERR_FILENO }
+    fn as_raw_fd(&self) -> RawFd {
+        libc::STDERR_FILENO
+    }
 }
 
 #[stable(feature = "rust1", since = "1.0.0")]
 impl AsRawFd for net::TcpStream {
-    fn as_raw_fd(&self) -> RawFd { *self.as_inner().socket().as_inner() }
+    fn as_raw_fd(&self) -> RawFd {
+        *self.as_inner().socket().as_inner()
+    }
 }
 
 #[stable(feature = "rust1", since = "1.0.0")]
 impl AsRawFd for net::TcpListener {
-    fn as_raw_fd(&self) -> RawFd { *self.as_inner().socket().as_inner() }
+    fn as_raw_fd(&self) -> RawFd {
+        *self.as_inner().socket().as_inner()
+    }
 }
 
 #[stable(feature = "rust1", since = "1.0.0")]
 impl AsRawFd for net::UdpSocket {
-    fn as_raw_fd(&self) -> RawFd { *self.as_inner().socket().as_inner() }
+    fn as_raw_fd(&self) -> RawFd {
+        *self.as_inner().socket().as_inner()
+    }
 }
 
 #[stable(feature = "from_raw_os", since = "1.1.0")]
diff --git a/src/libstd/sys/vxworks/ext/mod.rs b/src/libstd/sys/vxworks/ext/mod.rs
index d0f467b303f..251a198f821 100644
--- a/src/libstd/sys/vxworks/ext/mod.rs
+++ b/src/libstd/sys/vxworks/ext/mod.rs
@@ -1,18 +1,21 @@
 #![stable(feature = "rust1", since = "1.0.0")]
 #![allow(missing_docs)]
 
-pub mod io;
 pub mod ffi;
 pub mod fs;
-pub mod raw;
+pub mod io;
 pub mod process;
+pub mod raw;
 
 #[stable(feature = "rust1", since = "1.0.0")]
 pub mod prelude {
-    #[doc(no_inline)] #[stable(feature = "rust1", since = "1.0.0")]
-    pub use super::io::{RawFd, AsRawFd, FromRawFd, IntoRawFd};
-    #[doc(no_inline)] #[stable(feature = "rust1", since = "1.0.0")]
+    #[doc(no_inline)]
+    #[stable(feature = "rust1", since = "1.0.0")]
     pub use super::ffi::{OsStrExt, OsStringExt};
-    #[doc(no_inline)] #[stable(feature = "rust1", since = "1.0.0")]
-    pub use super::fs::{PermissionsExt, OpenOptionsExt, MetadataExt, FileTypeExt};
+    #[doc(no_inline)]
+    #[stable(feature = "rust1", since = "1.0.0")]
+    pub use super::fs::{FileTypeExt, MetadataExt, OpenOptionsExt, PermissionsExt};
+    #[doc(no_inline)]
+    #[stable(feature = "rust1", since = "1.0.0")]
+    pub use super::io::{AsRawFd, FromRawFd, IntoRawFd, RawFd};
 }
diff --git a/src/libstd/sys/vxworks/ext/process.rs b/src/libstd/sys/vxworks/ext/process.rs
index 4de72fa1816..e535c4aa122 100644
--- a/src/libstd/sys/vxworks/ext/process.rs
+++ b/src/libstd/sys/vxworks/ext/process.rs
@@ -3,10 +3,10 @@
 #![stable(feature = "rust1", since = "1.0.0")]
 
 use crate::io;
-use crate::sys::vxworks::ext::io::{FromRawFd, RawFd, AsRawFd, IntoRawFd};
 use crate::process;
 use crate::sys;
-use crate::sys_common::{AsInnerMut, AsInner, FromInner, IntoInner};
+use crate::sys::vxworks::ext::io::{AsRawFd, FromRawFd, IntoRawFd, RawFd};
+use crate::sys_common::{AsInner, AsInnerMut, FromInner, IntoInner};
 
 /// Unix-specific extensions to the [`process::Command`] builder.
 ///
@@ -55,7 +55,8 @@ pub trait CommandExt {
     /// locations may not appear where intended.
     #[stable(feature = "process_pre_exec", since = "1.34.0")]
     unsafe fn pre_exec<F>(&mut self, f: F) -> &mut process::Command
-        where F: FnMut() -> io::Result<()> + Send + Sync + 'static;
+    where
+        F: FnMut() -> io::Result<()> + Send + Sync + 'static;
 
     /// Schedules a closure to be run just before the `exec` function is
     /// invoked.
@@ -67,7 +68,8 @@ pub trait CommandExt {
     #[stable(feature = "process_exec", since = "1.15.0")]
     #[rustc_deprecated(since = "1.37.0", reason = "should be unsafe, use `pre_exec` instead")]
     fn before_exec<F>(&mut self, f: F) -> &mut process::Command
-        where F: FnMut() -> io::Result<()> + Send + Sync + 'static
+    where
+        F: FnMut() -> io::Result<()> + Send + Sync + 'static,
     {
         unsafe { self.pre_exec(f) }
     }
@@ -118,7 +120,8 @@ impl CommandExt for process::Command {
     }
 
     unsafe fn pre_exec<F>(&mut self, f: F) -> &mut process::Command
-        where F: FnMut() -> io::Result<()> + Send + Sync + 'static
+    where
+        F: FnMut() -> io::Result<()> + Send + Sync + 'static,
     {
         self.as_inner_mut().pre_exec(Box::new(f));
         self