I think more like some "1 page function summary in documentation style", e.
g. if you invoke "help(print)", or "help(for)", or "help(if)".
This would be useful only for working in REPL (Read–Eval–Print Loop) such as standalone Lua interpreter.
Usually I write Lua scripts in a GUI editor, not in REPL console.
Do you really use REPL most of the time?