Do not let figlet interpret - as args

Author: mathieui

plugins/figlet.py

@@ -8,6 +8,6 @@ def init(self):
         self.add_event_handler('private_say', self.figletize)
 
     def figletize(self, msg, tab):
-        process = subprocess.Popen(['figlet', msg['body']], stdout=subprocess.PIPE)
+        process = subprocess.Popen(['figlet', '--', msg['body']], stdout=subprocess.PIPE)
         result = process.communicate()[0].decode('utf-8')
         msg['body'] = result