Martin von Zweigbergk <martinvonz@google.com> [Fri, 13 Dec 2019 14:49:48 -0800] rev 43932
rebase: use cmdutil.check_at_most_one_arg() for --confirm/--dry-run
I've also updated the helper to work with the hyphenated --dry-run
option.
Differential Revision: https://phab.mercurial-scm.org/D7641