mozilla/rust — pull request #8198 by kballard (2013-08-01 22:04:27+00:00)
Title: Explicitly impl Clone for RWArc

RWArc had a clone() method, but it was part of impl RWArc instead of
an implementation of Clone.

Stick with the explicit implementation instead of deriving Clone so we
can have a docstring.

Fixes #8052.