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

1 files changed, 7 insertions, 23 deletions

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)?)? })
     }
 }