Obsolete documentation in 5.1.4

[Patrick Rapin <toupie300@...>]

Hello,

A colleague of mine tried to use an inexistent feature of lua stand-alone interpreter, because this is documented in both the on-line document lua.html [1] and its equivalent manual page lua.1.
It is strange that the text of [1] is quite different from the section 6 of the reference manual [2], although they describe the same thing.
What is clearly wrong is the sentence:

    "The index of the last argument is stored in
arg.n"

There is no such field in arg as of 5.1. I presume this is an obsolescence from Lua 5.0.

[1] http://www.lua.org/manual/5.1/lua.html
[2] http://www.lua.org/manual/5.1/manual.html#6