Bump black to 20.8b1 (and reformat) (#4371)

* Bump black version

* Reformat with black

redbot/core/commands/commands.py

@@ -1026,7 +1026,7 @@ class Cog(CogMixin, DPYCog, metaclass=DPYCogMeta):
 
     .. warning::
 
-        None of your methods should start with ``red_`` or 
+        None of your methods should start with ``red_`` or
         be dunder names which start with red (eg. ``__red_test_thing__``)
         unless to override behavior in a method designed to be overriden,
         as this prefix is reserved for future methods in order to be

redbot/core/commands/converter.py

@@ -75,7 +75,7 @@ def parse_timedelta(
     """
     This converts a user provided string into a timedelta
 
-    The units should be in order from largest to smallest. 
+    The units should be in order from largest to smallest.
     This works with or without whitespace.
 
     Parameters

redbot/core/commands/help.py

@@ -623,7 +623,10 @@ class RedHelpFormatter(HelpFormatterABC):
 
     @staticmethod
     async def help_filter_func(
-        ctx, objects: Iterable[SupportsCanSee], help_settings: HelpSettings, bypass_hidden=False,
+        ctx,
+        objects: Iterable[SupportsCanSee],
+        help_settings: HelpSettings,
+        bypass_hidden=False,
     ) -> AsyncIterator[SupportsCanSee]:
         """
         This does most of actual filtering.