RE: include Ada Reference Manual info files in ada-mode ELPA package?

[Drew Adams]

> >> Please use \` and \' instead of ^ and $.
> > What is the rationale for that?
> File names can contain newlines.
> > Is it documented somewhere?
> 
> (info "(Emacs) Regexps")
> ‘^’
> ‘$’
> 
> and (info "(Emacs) Regexp Backslash")
> ‘\`’
> ‘\'’

It seems like this is a fairly common question/misunderstanding.
^ and $ were even used in the Emacs source code for a long time
in places where \` and \' are more appropriate.

It would be good to add cross-refs here (both directions), and to
explicitly point out what the difference is, and that while the
effect can sometimes be similar, \`...\' is often what you want
when matching strings.