[tex-live] lua path

[Philip Taylor]

Philip Taylor wrote:

> At the TeX Live 2013 command prompt, typing "Lua" results in :
> 
>> 'Lua' is not recognized as an internal or external command,
>> operable program or batch file.

Just to follow up on this, what is the logic behind the
command "TeXdoc Lua" displaying:

> The lua-check-hyphen package
> Checking your hyphenated words

and "TeXdoc Perl" displaying :

> A Program For Automatic Pedigree Construction
> With pst-pdgr
> User Manual and Algorithm Description

** Phil.