Ooops... please ignore the first statement about [...] encapsulation in
my previous email, I had missed Glenn's answer that these are simply M4
quotes --- the full story is that in order not to run the full configure
which is really lengthy I did some trials with a simple cut & paste
without paying attention to dequoting.

So in a nutshell, I meant that I do not think that this is a bug in
Texinfo, because texi2any and makeinfo are two different programs.

   Vincent.

PS: patch update.