Merge branch 'sf/complete-stash-list'

The completion script (in contrib/) learned to complete a handful of
options "git stash list" command takes.

* sf/complete-stash-list:
  git-completion.bash: add completion for stash list

Author: gitster

contrib/completion/git-completion.bash

@@ -2567,6 +2567,9 @@ _git_stash ()
 		drop,--*)
 			__gitcomp "--quiet"
 			;;
+		list,--*)
+			__gitcomp "--name-status --oneline --patch-with-stat"
+			;;
 		show,--*|branch,--*)
 			;;
 		branch,*)