fix alias tip (#255)

Agent-Fennec · kyb3r · commit 74de72314828 · 2019-05-28T23:33:20.000+10:00
diff --git a/cogs/utility.py b/cogs/utility.py
@@ -829,7 +829,7 @@ async def alias(self, ctx):
         """
         Create shortcuts to bot commands.
 
-        When `?alias` is used by itself, this will retrieve
+        When `{prefix}alias` is used by itself, this will retrieve
         a list of alias that are currently set.
 
         To use alias:
