mxcl/homebrew — pull request #17779 by docwhat (2013-02-12 02:44:46+00:00)
Title: mercurial: Use opt_prefix in caveat

The caveat mentioned that the `hgext` directory was
in the Cellar. A better path is the `opt_prefix` path
because it doesn't change when the mercurial is updated.

This closes issue #17773