New method to escape markdown.

Improvements to patterns.lua.

plugins/patterns.lua

@@ -2,16 +2,16 @@
  -- he upset himself over the very thought of me doing so.
 
 local triggers = {
-	'^/s/.-/.-/?$'
+	'^/?s/.-/.-/?$'
 }
 
 local action = function(msg)
 
 	if not msg.reply_to_message then return end
 	local output = msg.reply_to_message.text or ''
-	output = output:gsub(
-		msg.text:match('^/s/(.-)/(.-)/?$')
-	)
+	local m1, m2 = msg.text:match('^/?s/(.-)/(.-)/?$')
+	if not m2 then return true end
+	output = output:gsub(m1, m2)
 	output = 'Did you mean:\n"' .. output:sub(1, 4000) .. '"'
 	sendReply(msg.reply_to_message, output)