Jakukyo Friel aad52918f4 doc/External-Commands: update links
`brew-gem`'s link is 404.
`brew-pip` has reached EOL.
Thus I updates the link of `brew-gem`, and remove descriptions
about `brew-pip`.

Thanks @DomT4 for pointing out brew-gem's new home.

Closes Homebrew/homebrew#34569.

Signed-off-by: Jack Nagel <jacknagel@gmail.com>
2014-12-06 22:05:23 -05:00
..
2014-11-21 01:05:53 -06:00