401b45fb01
Currently, `brew link` installs `*.info` files to
`#{HOMEBREW_PREFIX}/share/info/dir` using the `install_info` method.
However, some formulae (e.g., `Emacs`) also ship `*.info.gz` files,
which are only `symlink`ed but not installed.
This commit allows `*.info.gz` files to be installed during linking in
addition to the `*.info` files.
Library
This directory contains all the code run by the official brew command in Homebrew and all formulae (package descriptions) in taps (repositories containing formulae) in Taps subdirectories.