Re: Usage of _PROMPT and _PROMPT2

[Roberto Ierusalimschy <roberto@...>]

> > Also why isn't this documented anywhere?
> 
> At last, a valid point. It was documented up to Lua 5.1.5.
> Its omission was probably a slip of the mouse.

We have considered removing this feature, as it seems that very few
people use it (even less now, as it is not documented :-) and its
benefits to the language seem quite small (if any). But in the end
we did not reach a final decision and so it was left as it is now
(implemented but not documented).

-- Roberto