sorin-ionescu/prezto — pull request #489 by lunaryorn (2013-11-01 16:45:56+00:00)
Title: Use rebase for brew update

Use `brew update --rebase` to make Homebrew use `git pull --rebase` when updating.

This prevents homebrew from doing lots of merge commits or even prompting for merge messages, if the user has disabled fast-forward merges in her `.gitconfig`.