;; I want to see trailing whitespace.
(setq-default show-trailing-whitespace t)
+
+;; Don't ignore .git directories when tab-completing filenames, for
+;; two reasons. First, it's nice to be able to tell that a directory
+;; is a git repository from the output of "ls", and giving them a .git
+;; suffix is an easy way to do that. Second, editing .git/config is
+;; the easiest way to do a lot of things in git.
+(setq completion-ignored-extensions
+ (remove ".git/" completion-ignored-extensions))