Lua code formatters and beautifiers

[Luiz Henrique de Figueiredo <lhf@...>]

To complement the discussion on code style, what Lua code formatters and
beautifiers are available and which ones do you recommend?

The wiki has one but not a list:
	http://lua-users.org/wiki/SourceCodeFormatter

I wish my ltokenp could be used for that but it discards comments
because it uses the lexer from the Lua core library.