admin: add .raw command to send raw IRC messages

sopel/modules/admin.py

@@ -25,6 +25,8 @@
 """Error message when channel is missing from command arguments."""
 ERROR_NOTHING_TO_SAY = 'I need a channel and a message to talk.'
 """Error message when channel and/or message are missing."""
+ERROR_NOTHING_TO_RAW = 'I need an IRC message to send.'
+"""Error message when no raw IRC message was given."""
 
 
 class AdminSection(types.StaticSection):
@@ -224,6 +226,23 @@ def quit(bot, trigger):
     bot.quit(quit_message)
 
 
+@plugin.require_privmsg
+@plugin.require_admin
+@plugin.command('raw')
+@plugin.priority('low')
+@plugin.example('.raw PRIVMSG NickServ :CERT ADD')
+def raw(bot, trigger):
+    """
+    Send a raw IRC message. Can only be done in privmsg by an admin. This is
+    mostly useful for debugging.
+    """
+    if trigger.group(2) is None:
+        bot.reply(ERROR_NOTHING_TO_RAW)
+        return
+
+    bot.write([trigger.group(2)])
+
+
 @plugin.require_privmsg
 @plugin.require_admin
 @plugin.command('say', 'msg')