Fix formatting in UnixStream write implementation

Author: mlowicki

library/std/src/os/unix/net/stream.rs

@@ -664,11 +664,11 @@ impl io::Write for UnixStream {
 #[stable(feature = "unix_socket", since = "1.10.0")]
 impl<'a> io::Write for &'a UnixStream {
     fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
-        let len = cmp::min(buf.len(), <wrlen_t>::MAX as usize) as wrlen_t; 
-        let ret = cvt(unsafe { 
-            libc::send(self.0.as_raw(), buf.as_ptr() as *const c_void, len, MSG_NOSIGNAL) 
-        })?; 
-        Ok(ret as usize) 
+        let len = cmp::min(buf.len(), <wrlen_t>::MAX as usize) as wrlen_t;
+        let ret = cvt(unsafe {
+            libc::send(self.0.as_raw(), buf.as_ptr() as *const c_void, len, MSG_NOSIGNAL)
+        })?;
+        Ok(ret as usize)
     }
 
     fn write_vectored(&mut self, bufs: &[IoSlice<'_>]) -> io::Result<usize> {