MarkdownBear: Rename test classname

Rename test classname from `MarkdownBearMaxLineLengthMessageTest`
to `MarkdownBearTest` because there were a few generic additions
to the tests.

tests/markdown/MarkdownBearTest.py

@@ -50,7 +50,7 @@


@generate_skip_decorator(MarkdownBear)
class MarkdownBearMaxLineLengthMessageTest(unittest.TestCase):
class MarkdownBearTest(unittest.TestCase):

    def setUp(self):
        self.section = Section('name')