[lltx] \expanded: a pdfTeX primitive?

[Manuel Pégourié-Gonnard]

Hi,

According to the manual (and tex.extraprimitives), \expanded is a pdfTeX
primitive. However,

% pdftex -ini '\show\expanded \end'
This is pdfTeX, Version 3.1415926-1.40.11 (TeX Live 2010) (INITEX)
 restricted \write18 enabled.
> \expanded=undefined.
<*> \show\expanded
                   \end
?
No pages of output.
Transcript written on texput.log.

Also, I can find no mention of \expanded in the pdfTeX manual. Am I missing
something?

Manuel.