Re: ?\_ patch

[Richard Stallman]

    Ok.  So I assume that you want ?XY to be invalid syntax
    unless Y is <= 040 or one of  " ' ; ( ) [ ] ? or #

That is the idea.  I can see how someone could have written (?a(b))
and think it legitimate, but a person could hardly argue that (?ab)
instead of (?a b) is legitimate.

It's possible there is some other syntax char I have forgotten
that should be legitimate there too.  If you can think of one,
please add it.