* git-commit-mode - A major mode for editing Git commit messages
  according to the guidelines by Tim Pope.
* git-rebase-mode - A major mode for git-rebase-todo files created by
  git rebase -i
* gitconfig-mode - A 'conf-mode'-derived major mode for editing
  .gitconfig files.
* gitignore-mode - A 'conf-mode'-derived major mode for editing
  .gitignore files.
* gitattributes-mode - A major mode for editing .gitattributes files.

WWW: https://github.com/magit/git-modes

PR:		187781
Submitted by:	Yasuhiro KIMURA <yasu@utahime.org>