Merge branch 'master' into next

* master:
gitk: show_error fix
[PATCH] gitk: start-up bugfix
[PATCH] gitk: Replace "git-" commands with "git "
[PATCH] gitk: Display commit messages with word wrap
gitk: Fix bug where page-up/down wouldn't always work properly
gitk: Fix display of "(...)" for parents/children we haven't drawn