mxcl/homebrew — pull request #18186 by telemachus (2013-03-02 11:57:01+00:00)
Title: A more helpful error message for `brew untap`

`brew untap` without arguments currently errors out (as it should), but the
error message is generic and unhelpful. (The error message is borrowed from
a method in the tap command - `tap_args`.)

See also 18174.