uds: minor doc fix in UnixStream and UnixDatagram (#754)

tokio-uds/src/datagram.rs

@@ -31,8 +31,8 @@ impl UnixDatagram {
     /// Creates an unnamed pair of connected sockets.
     ///
     /// This function will create a pair of interconnected Unix sockets for
-    /// communicating back and forth between one another. Each socket will be
-    /// associated with the event loop whose handle is also provided.
+    /// communicating back and forth between one another. Each socket will
+    /// be associated with the default event loop's handle.
     pub fn pair() -> io::Result<(UnixDatagram, UnixDatagram)> {
         let (a, b) = mio_uds::UnixDatagram::pair()?;
         let a = UnixDatagram::new(a);