MarkdownBear: Rename test classname

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

Author: yash-nisar

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')