Previously, this would error whenever a message without a first argument was present in irc.state.history.
ERROR 2015-12-17T21:12:51 Uncaught exception in _callRegexp:
Traceback (most recent call last):
File "/home/gl/.local/lib/python3.4/site-packages/supybot/callbacks.py", line 1457, in _callRegexp
method(irc, msg, m)
File "/home/gl/SupyPlugins/Replacer/plugin.py", line 116, in replacer
if m.args[0] == msg.args[0] and \
IndexError: tuple index out of range
ERROR 2015-12-17T21:12:51 Exception id: 0x2b96f