Documentation / config / completion.txton commit tests: add a special setup where rebase.useBuiltin is off (62c2393)
   1completion.commands::
   2        This is only used by git-completion.bash to add or remove
   3        commands from the list of completed commands. Normally only
   4        porcelain commands and a few select others are completed. You
   5        can add more commands, separated by space, in this
   6        variable. Prefixing the command with '-' will remove it from
   7        the existing list.