mxcl/homebrew — pull request #9038 by pstadler (2011-12-08 10:23:55+00:00)
Title: `brew deps <formula>` now marks already installed dependencies with an asterisk

This applies to all switches but `--all`

```bash
$ brew deps --tree wireshark
wireshark
> gnutls
> > pkg-config
> > libgcrypt
> > > libgpg-error
> > libtasn1
> pcre*
> glib*
> > gettext*
> > libffi*
> > libiconv*
```