don't use Result::ok just to be able to use unwrap/unwrap_or

src/libstd/sys/unix/fs.rs

@@ -391,7 +391,7 @@ mod tests {
         let mut reader = FileDesc::new(reader, true);
         let mut writer = FileDesc::new(writer, true);
 
-        writer.write(b"test").ok().unwrap();
+        writer.write(b"test").unwrap();
         let mut buf = [0; 4];
         match reader.read(&mut buf) {
             Ok(4) => {