Add [] around $0

gameloop.py

@@ -2,6 +2,9 @@ import enum
 import random
 from collections import namedtuple
 
+# TODO: !redeal
+# TODO: offtopia-norandom preset
+
 import cardcast_api
 
 class events(enum.Enum):
@@ -638,7 +641,7 @@ def game(send, notice, voice, devoice, get_event):
 					index = int(char)
 
 					if 0 <= index < len(responses):
-						r.append(responses[index])
+						r.append('[' + responses[index] + ']')
 					else:
 						# Not valid backreference, copy verbatim
 						r.append('$' + char)