Documentation / sequencer.txton commit difftool --no-index: error out on --dir-diff (and don't crash) (f3a3a02)
   1--continue::
   2        Continue the operation in progress using the information in
   3        '.git/sequencer'.  Can be used to continue after resolving
   4        conflicts in a failed cherry-pick or revert.
   5
   6--quit::
   7        Forget about the current operation in progress.  Can be used
   8        to clear the sequencer state after a failed cherry-pick or
   9        revert.
  10
  11--abort::
  12        Cancel the operation and return to the pre-sequence state.