Improved 'leaderboard' command embed formatting

- Added proper vote count to leaderboard
- Supported shared rankings in leaderboard
- New generator in helpers 'ending_iterator'

bot/helpers.py

@@ -1,5 +1,5 @@
 import datetime
-from typing import Union
+from typing import Any, Generator, List, Union
 
 import discord
 
@@ -14,9 +14,11 @@ def is_upvote(emoji: Union[discord.Emoji, discord.PartialEmoji, str]) -> bool:
     return False
 
 
-def general_embed(title: str = '', message: str = '', color: discord.Color = constants.GENERAL_COLOR, timestamp: bool = False) -> discord.Embed:
+def general_embed(title: str = '', message: str = '', color: discord.Color = constants.GENERAL_COLOR,
+                  timestamp: bool = False) -> discord.Embed:
     """A generic mostly unstyled embed with a blue color."""
-    return discord.Embed(title=title, description=message, timestamp=datetime.datetime.utcnow() if timestamp else discord.Embed.Empty, color=color)
+    return discord.Embed(title=title, description=message, timestamp=datetime.datetime.utcnow() if timestamp else discord.Embed.Empty,
+                         color=color)
 
 
 def error_embed(*args, **kwargs):
@@ -29,3 +31,16 @@ def success_embed(*args, **kwargs):
     """A generic embed with a light green color."""
     kwargs['color'] = constants.SUCCESS_COLOR
     return general_embed(*args, **kwargs)
+
+
+def ending_iterator(items: List[Any]) -> Generator[Any, None, None]:
+    """A generator which iterates along the list until it reaches the end, where it continuously yields the final item forever."""
+    index = 0
+    length = len(items) - 1
+    last = items[-1]
+    while True:
+        if index == length:
+            yield last
+        else:
+            yield items[index]
+            index += 1