Merge pull request #2127 from sopel-irc/tools.events-enum

tools.events: convert to `Enum`

sopel/tools/_events.py

@@ -1,7 +1,9 @@
 from __future__ import generator_stop
 
+from enum import Enum
 
-class events(object):
+
+class events(str, Enum):
     """An enumeration of all the standardized and notable IRC numeric events
 
     This allows you to do, for example, ``@plugin.event(events.RPL_WELCOME)``
@@ -79,7 +81,7 @@ class events(object):
     ERR_NOTREGISTERED = '451'
     ERR_NEEDMOREPARAMS = '461'
     ERR_ALREADYREGISTRED = '462'
-    ERR_ALREADYREGISTERED = '462'  # corrected spelling used in some tutorials
+    ERR_ALREADYREGISTERED = ERR_ALREADYREGISTRED  # corrected spelling used in some tutorials
     ERR_NOPERMFORHOST = '463'
     ERR_PASSWDMISMATCH = '464'
     ERR_YOUREBANNEDCREEP = '465'