sync: Fix flake8 E125 and E129 warnings

- E129 visually indented line with same indent as next logical line
- E125 continuation line with same indent as next logical line

Fixed automatically by:

 autopep8 --in-place --select E125,E129 subcmds/sync.py

Change-Id: Ia2f82f443e1e6a23ba22c6f9849c8485405aed0e
Reviewed-on: https://gerrit-review.googlesource.com/c/git-repo/+/256092
Reviewed-by: Mike Frysinger <vapier@google.com>
Tested-by: David Pursehouse <dpursehouse@collab.net>