The check() method of StyleChecker subclasses are instance methods,
while CommitChecker subclasses use class methods. This makes unified
handling of checkers more complicated. Turn the StyleChecker check()
method into a class method, passing it the contents to be checked
directly.
While at it, fix two style issues reported by checkstyle.py.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
b488a862df