added regex-like Lua patterns plugin

config.lua

@@ -104,6 +104,7 @@ Send /help to get started.
 		'hearthstone.lua',
 		'shout.lua',
 		'apod.lua',
+		'patterns.lua',
 		-- Put new plugins above this line.
 		'help.lua',
 		'greetings.lua'

plugins/patterns.lua

@@ -0,0 +1,23 @@
+ -- Shout-out to Kenny, as I didn't want to write this until
+ -- he upset himself over the very thought of me doing so.
+
+local triggers = {
+	'^/s/.-/.-/?$'
+}
+
+local action = function(msg)
+
+	if not msg.reply_to_message then return end
+	msg.reply_to_message.text = msg.reply_to_message.text or ''
+	local output = msg.reply_to_message.text:gsub(
+		msg.text:match('^/s/(.-)/(.-)/?$')
+	)
+	output = 'Did you mean:\n"' .. output:sub(1, 4000) .. '"?'
+	sendReply(msg.reply_to_message, output)
+
+end
+
+return {
+	triggers = triggers,
+	action = action
+}