Channel modes of type C need an argument when set, but not when they get reset
Example: l (limit)
# File lib/rbot/irc.rb, line 1230 def initialize(ch) super @arg = nil end
# File lib/rbot/irc.rb, line 1244 def reset @arg = nil end
# File lib/rbot/irc.rb, line 1240 def set(val) @arg = val end
# File lib/rbot/irc.rb, line 1235 def status @arg end