> If this is what you propose, then you should discuss this with the
> Texinfo developers, not with Emacs developers. We don't develop and
> don't maintain the tools used to produce the Info manuals from their
> Texinfo sources. We just write the Texinfo sources and then invoke
> the Texinfo processors to produce the Info format.
Thinking about this it occurred to me there is a simple heuristic
solution without involving the Texinfo folks.
Apparently @example is rendered after an empty line with a 5 spaces
indent. So it is easy to detect code sections, by looking for empty
lines followed by +5 spaces indented lines. The code section starts at
the empty line and ends when the indent is 5 spaces less again.