rb19-haml: whitespace only


git-svn-id: http://svn.macports.org/repository/macports/trunk/dports@101704 d073be05-634f-4543-b044-5fe20cf6d1d6
rb19-haml: update to 3.1.7, claim maintainership, change to new-style checksums


git-svn-id: http://svn.macports.org/repository/macports/trunk/dports@101705 d073be05-634f-4543-b044-5fe20cf6d1d6