[V3] Start work on fuzzy command search (#1600)

* [V3] Start work on fuzzy command search

* Implement in command error handler

* Something isn't working here, try fixing

* Style compliance

* Add fuzzywuzzy to pipfile

* Dump the short doc part if there is no short doc

* Add fuzzy command search on command not found in help

* Move things around, implement for use of default d.py help formatter

* Formatting compliance

* Undo pipfile changes

redbot/core/bot.py

@@ -86,6 +86,9 @@ class RedBase(BotBase):
             loop = asyncio.get_event_loop()
             loop.run_until_complete(self._dict_abuse(kwargs))
 
+        if "command_not_found" not in kwargs:
+            kwargs["command_not_found"] = "Command {} not found.\n{}"
+
         self.counter = Counter()
         self.uptime = None