Merge branch 'cc/cherry-pick-series'

* cc/cherry-pick-series:
  Documentation/revert: describe passing more than one commit
  Documentation/cherry-pick: describe passing more than one commit
  revert: add tests to check cherry-picking many commits
  revert: allow cherry-picking more than one commit
  revert: change help_msg() to take no argument
  revert: refactor code into a do_pick_commit() function
  revert: use run_command_v_opt() instead of execv_git_cmd()
  revert: cleanup code for -x option