Reformat code using black

Segments where readability was hampered were fixed by appropriate
format skipping directives. New code should hopefully be black
compatible. The moment they remove the -S option is probably the moment
I stop using black though.

discord/ext/commands/help.py

@@ -932,7 +932,7 @@ class DefaultHelpCommand(HelpCommand):
     def shorten_text(self, text):
         """:class:`str`: Shortens text to fit into the :attr:`width`."""
         if len(text) > self.width:
-            return text[:self.width - 3].rstrip() + '...'
+            return text[: self.width - 3].rstrip() + '...'
         return text
 
     def get_ending_note(self):