RFA: fix PR 8079

[Tom Tromey]

>>>>> "Tom" == Tom Tromey <tromey@redhat.com> writes:

Tom> As promised, here is the patch from PR 8079, with a few updates.
Tom> The bug concerns showing the user the expression as they typed it --
Tom> not the printed form of the parsed expression.  This is nice because
Tom> it means numeric constants show up the way they were typed, rather
Tom> than in the prevailing output radix.

FYI, I am going to check this in a bit later today.

Tom