IMHO, Lua does not encourage good commenting, because the language is
already quite clean.
Lua has no need of tautological comments, true. Except if the recurrent baying for syntax like `x+=++y` eventually succeeds, which is unlikely.
But if you like to comment properly, i.e. to explain the strategy rather than the tactics of your code, then Lua is helpful.
-- A standard construction for a comment that can start after code and goes to the end of the line.
--[[
An easy construction for a comment that spans many lines and can contain arbitrary characters.
Also useful for temporarily disabling code.
--]]
---[[ An optimally quick way to enable the code again.
-- Lua's support for literate programming tools is nonexistent (no line pragmas) and therefore you have no option but to use comments. :-Q
