In figuring out what changed in a theme's files (an incorrectly made subtheme; instead of overriding the base themes stylesheets, changes should have gone into its own files with different names), these commands were useful.
diff -uP themes/bartik/css/colors.css sites/default/themes/dgd7theme/css/style.css > theme.diff
git log --cc sites/default/themes/dgd7theme/css/style.css > log.diff
Kept running them for the three different files, and reloading theme.diff and log.diff in gvim to see the changes. Quite convenient.
Except where otherwise noted, content on this site is licensed under a Creative Commons Attribution 3.0 Unported License.