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/context.py

@@ -49,9 +49,11 @@ if TYPE_CHECKING:
     from .help import HelpCommand
     from .view import StringView
 
+# fmt: off
 __all__ = (
     'Context',
 )
+# fmt: on
 
 MISSING: Any = discord.utils.MISSING
 
@@ -122,7 +124,8 @@ class Context(discord.abc.Messageable, Generic[BotT]):
         or invoked.
     """
 
-    def __init__(self,
+    def __init__(
+        self,
         *,
         message: Message,
         bot: BotT,
@@ -237,7 +240,7 @@ class Context(discord.abc.Messageable, Generic[BotT]):
             view.index = len(self.prefix or '')
             view.previous = 0
             self.invoked_parents = []
-            self.invoked_with = view.get_word() # advance to get the root command
+            self.invoked_with = view.get_word()  # advance to get the root command
         else:
             to_call = cmd