In the printed manual, this looks like
\r
\R
\RET
\s
\S
\SP
Ah. Ok, I see the issue now for groff, but exceedingly few programs
need to document anything about \ANY-ARBITARY-KEY. Whereas the angle
brackets, backslashes, lozenges, or whatever, just seem like a
distraction when there is no practical confusion.
So maybe you could/should hack up another macro for groff.texinfo to
insert the angle brackets (or whatever you prefer)?
Alternatively, if you want a style option in texinfo.tex, I don't mind.
I'm believing more than ever that the default should be unchanged,
though.
