Run black on all examples and require it for CI

examples/custom_context.py

@@ -30,15 +30,17 @@ class MyBot(commands.Bot):
         # subclass to the super() method, which tells the bot to
         # use the new MyContext class
         return await super().get_context(message, cls=cls)
-        
+
+
 intents = discord.Intents.default()
 intents.message_content = True
 
 bot = MyBot(command_prefix='!', intents=intents)
 
+
 @bot.command()
 async def guess(ctx, number: int):
-    """ Guess a random number from 1 to 6. """
+    """Guess a random number from 1 to 6."""
     # explained in a previous example, this gives you
     # a random number from 1-6
     value = random.randint(1, 6)
@@ -47,8 +49,9 @@ async def guess(ctx, number: int):
     # or a red cross mark if it wasn't
     await ctx.tick(number == value)
 
+
 # IMPORTANT: You shouldn't hard code your token
-# these are very important, and leaking them can 
+# these are very important, and leaking them can
 # let people do very malicious things with your
 # bot. Try to use a file or something to keep
 # them private, and don't commit it to GitHub