Re: ?\_ patch

[Richard Stallman]

    Morever, `#' is _good_ becaues it's the general lisp syntax for special
    syntax, so a lisp programmer will be much more likely to realize what's 
going
    on (if he's unfamiliar with this particular bit of syntax) if he sees #\SPC
    than if he sees ?SPC.

? is already our syntax for character constants; I see no reason
for changing that.