mozilla/rust — pull request #14110 by SSheldon (2014-05-11 10:57:28+00:00)
Title: Implement Mutable trait for StrBuf

Despite implementing the Container trait, StrBuf did not implement the Mutable trait and had no clear method; this request implements the clear method of the Mutable trait for StrBuf.

Testing done: added a test and ran `make check` without any failures.