Update key.lua

docs/key.lua

@@ -1,6 +1,6 @@
 --Litterally just the prefix right now
-return "exp!"
+return ""
 -- This project is libre, and licenced under the terms of the
 -- DO WHAT THE FUCK YOU WANT TO PUBLIC LICENCE, version 3.1,
 -- as published by dtf on July 2019. See the COPYING file or
--- https://ph.dtf.wtf/w/wtfpl/#version-3-1 for more details.
+-- https://ph.dtf.wtf/w/wtfpl/#version-3-1 for more details.