Merge branch 'maint'

Merge branch 'maint'

* maint:
  bisect: fix bad rev checking in "git bisect good"
  revision.c: make --date-order overriddable
  git-submodule: Avoid 'fatal: cannot describe' message
  Force the medium pretty format on calls to git log
  Fix section about backdating tags in the git-tag docs
  Document option --only of git commit
  Documentation/git-request-pull: Fixed a typo ("send" -> "end")