Use FileMerge as a diff command for Subversion and Mercurial

Current versions:
20150915 HEAD


Formula history

Dominyk Tiller fmdiff: needs Xcode installed on >10.6
Andrew Janke audit fixes: F 02: findutils - fmdiff
Andrew Janke fmdiff 20150915
Nikolaus Wittenstein Add descriptions to all remaining homebrew packages
Baptiste Fontaine fmdiff: modernize