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

7 files changed, 17 insertions, 44 deletions

diff --git a/src/libstd/sys/cloudabi/os.rs b/src/libstd/sys/cloudabi/os.rs
index 7db7808a087..326faaa852a 100644
--- a/src/libstd/sys/cloudabi/os.rs
+++ b/src/libstd/sys/cloudabi/os.rs
@@ -18,9 +18,7 @@ pub fn errno() -> i32 {
 pub fn error_string(errno: i32) -> String {
     // cloudlibc's strerror() is guaranteed to be thread-safe. There is
     // thus no need to use strerror_r().
-    str::from_utf8(unsafe { CStr::from_ptr(libc::strerror(errno)) }.to_bytes())
-        .unwrap()
-        .to_owned()
+    str::from_utf8(unsafe { CStr::from_ptr(libc::strerror(errno)) }.to_bytes()).unwrap().to_owned()
 }
 
 pub fn exit(code: i32) -> ! {
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) {}
diff --git a/src/libstd/sys/cloudabi/thread.rs b/src/libstd/sys/cloudabi/thread.rs
index 240b6ea9e57..3afcae7ae75 100644
--- a/src/libstd/sys/cloudabi/thread.rs
+++ b/src/libstd/sys/cloudabi/thread.rs
@@ -58,8 +58,8 @@ impl Thread {
     }
 
     pub fn sleep(dur: Duration) {
-        let timeout = checked_dur2intervals(&dur)
-            .expect("overflow converting duration to nanoseconds");
+        let timeout =
+            checked_dur2intervals(&dur).expect("overflow converting duration to nanoseconds");
         unsafe {
             let subscription = abi::subscription {
                 type_: abi::eventtype::CLOCK,
@@ -85,11 +85,7 @@ impl Thread {
         unsafe {
             let ret = libc::pthread_join(self.id, ptr::null_mut());
             mem::forget(self);
-            assert!(
-                ret == 0,
-                "failed to join thread: {}",
-                io::Error::from_raw_os_error(ret)
-            );
+            assert!(ret == 0, "failed to join thread: {}", io::Error::from_raw_os_error(ret));
         }
     }
 }
diff --git a/src/libstd/sys/cloudabi/time.rs b/src/libstd/sys/cloudabi/time.rs
index 5e502dcb2ba..c209231cf8c 100644
--- a/src/libstd/sys/cloudabi/time.rs
+++ b/src/libstd/sys/cloudabi/time.rs
@@ -10,9 +10,7 @@ pub struct Instant {
 }
 
 pub fn checked_dur2intervals(dur: &Duration) -> Option<abi::timestamp> {
-    dur.as_secs()
-        .checked_mul(NSEC_PER_SEC)?
-        .checked_add(dur.subsec_nanos() as abi::timestamp)
+    dur.as_secs().checked_mul(NSEC_PER_SEC)?.checked_add(dur.subsec_nanos() as abi::timestamp)
 }
 
 impl Instant {
@@ -39,15 +37,11 @@ impl Instant {
     }
 
     pub fn checked_add_duration(&self, other: &Duration) -> Option<Instant> {
-        Some(Instant {
-            t: self.t.checked_add(checked_dur2intervals(other)?)?,
-        })
+        Some(Instant { t: self.t.checked_add(checked_dur2intervals(other)?)? })
     }
 
     pub fn checked_sub_duration(&self, other: &Duration) -> Option<Instant> {
-        Some(Instant {
-            t: self.t.checked_sub(checked_dur2intervals(other)?)?,
-        })
+        Some(Instant { t: self.t.checked_sub(checked_dur2intervals(other)?)? })
     }
 }
 
@@ -69,29 +63,19 @@ impl SystemTime {
     pub fn sub_time(&self, other: &SystemTime) -> Result<Duration, Duration> {
         if self.t >= other.t {
             let diff = self.t - other.t;
-            Ok(Duration::new(
-                diff / NSEC_PER_SEC,
-                (diff % NSEC_PER_SEC) as u32,
-            ))
+            Ok(Duration::new(diff / NSEC_PER_SEC, (diff % NSEC_PER_SEC) as u32))
         } else {
             let diff = other.t - self.t;
-            Err(Duration::new(
-                diff / NSEC_PER_SEC,
-                (diff % NSEC_PER_SEC) as u32,
-            ))
+            Err(Duration::new(diff / NSEC_PER_SEC, (diff % NSEC_PER_SEC) as u32))
         }
     }
 
     pub fn checked_add_duration(&self, other: &Duration) -> Option<SystemTime> {
-        Some(SystemTime {
-            t: self.t.checked_add(checked_dur2intervals(other)?)?,
-        })
+        Some(SystemTime { t: self.t.checked_add(checked_dur2intervals(other)?)? })
     }
 
     pub fn checked_sub_duration(&self, other: &Duration) -> Option<SystemTime> {
-        Some(SystemTime {
-            t: self.t.checked_sub(checked_dur2intervals(other)?)?,
-        })
+        Some(SystemTime { t: self.t.checked_sub(checked_dur2intervals(other)?)? })
     }
 }