[llvm-dev] Using isonum.txt substitutions in reST documents?

[Robinson, Paul via llvm-dev]

I'd like to use one of the special marks (the circle-R registered
trademark symbol) on a webpage that's coded in .rst format.  On an
HTML page I'd use ® but I'm less comfortable with reST.  It
looks like I'd need to add
  .. include:: isonum.txt
and then I could use the |reg| substitution in the body text.

Would that work?  Would anybody mind?  I'd naively expect that
whatever process converts the .rst to HTML has isonum.txt, but I
don't actually know how that works.
Thanks,
--paulr