[luatex] [NTG-pdftex] tex.enableprimitives producing non-primitives?

[Philip TAYLOR]

Heiko Oberdiek wrote:

>> [discussion about the use of \pdfprimitive]

I was unaware of this interesting (and potentially useful)
command, so may I make a suggestion as to the documentation ?
Where it currently reads : "If the control sequence was
initially expandable, \pdfprimitive expands either.", a more
idiomatic version might end "..., \pdfprimitive also expands."

** Phil.