Colorizing source code in Info manuals

[Cecilio Pardo]

Hello,

As texinfo is not going to add features like color to the Info format,
I think maybe emacs could add some itself.

For example, the Emacs Lisp Intro uses @smallexample blocks for
presenting lisp code. I modified makeinfo more or less successfully to
generate a file with the line numbers where these blocks start. With
this kind of information, emacs could fontify the source code.

Does this sound good?