Change '-f all' to '-f default'. fixes #88

Signed-off-by: Daira Hopwood <daira@jacaranda.org>
Cosmetics for option usage.

Signed-off-by: Daira Hopwood <daira@jacaranda.org>
Merge pull request #102 from python-modernize/88-change-all-to-default

88 change all to default