diff -r d9f85f61f0ed -r ce088b38f92b rust/chg/src/clientext.rs
--- a/rust/chg/src/clientext.rs	Fri Dec 06 16:09:03 2019 -0500
+++ b/rust/chg/src/clientext.rs	Sat Dec 07 13:06:25 2019 -0800
@@ -9,8 +9,8 @@
 use std::os::unix::ffi::OsStrExt;
 use std::os::unix::io::AsRawFd;
 use std::path::Path;
+use tokio_hglib::protocol::OneShotRequest;
 use tokio_hglib::{Client, Connection};
-use tokio_hglib::protocol::OneShotRequest;
 
 use super::attachio::AttachIo;
 use super::message;
@@ -18,46 +18,54 @@
 use super::uihandler::SystemHandler;
 
 pub trait ChgClientExt<C>
-    where C: Connection + AsRawFd,
+where
+    C: Connection + AsRawFd,
 {
     /// Attaches the client file descriptors to the server.
     fn attach_io<I, O, E>(self, stdin: I, stdout: O, stderr: E) -> AttachIo<C, I, O, E>
-        where I: AsRawFd,
-              O: AsRawFd,
-              E: AsRawFd;
+    where
+        I: AsRawFd,
+        O: AsRawFd,
+        E: AsRawFd;
 
     /// Changes the working directory of the server.
     fn set_current_dir<P>(self, dir: P) -> OneShotRequest<C>
-        where P: AsRef<Path>;
+    where
+        P: AsRef<Path>;
 
     /// Runs the specified Mercurial command with cHg extension.
     fn run_command_chg<I, P, H>(self, handler: H, args: I) -> ChgRunCommand<C, H>
-        where I: IntoIterator<Item = P>,
-              P: AsRef<OsStr>,
-              H: SystemHandler;
+    where
+        I: IntoIterator<Item = P>,
+        P: AsRef<OsStr>,
+        H: SystemHandler;
 }
 
 impl<C> ChgClientExt<C> for Client<C>
-    where C: Connection + AsRawFd,
+where
+    C: Connection + AsRawFd,
 {
     fn attach_io<I, O, E>(self, stdin: I, stdout: O, stderr: E) -> AttachIo<C, I, O, E>
-        where I: AsRawFd,
-              O: AsRawFd,
-              E: AsRawFd,
+    where
+        I: AsRawFd,
+        O: AsRawFd,
+        E: AsRawFd,
     {
         AttachIo::with_client(self, stdin, stdout, Some(stderr))
     }
 
     fn set_current_dir<P>(self, dir: P) -> OneShotRequest<C>
-        where P: AsRef<Path>,
+    where
+        P: AsRef<Path>,
     {
         OneShotRequest::start_with_args(self, b"chdir", dir.as_ref().as_os_str().as_bytes())
     }
 
     fn run_command_chg<I, P, H>(self, handler: H, args: I) -> ChgRunCommand<C, H>
-        where I: IntoIterator<Item = P>,
-              P: AsRef<OsStr>,
-              H: SystemHandler,
+    where
+        I: IntoIterator<Item = P>,
+        P: AsRef<OsStr>,
+        H: SystemHandler,
     {
         ChgRunCommand::with_client(self, handler, message::pack_args_os(args))
     }