bug#6937: 24.0.50; compilation-next-error-function parsing is dependent on where the cursor resides

[Chong Yidong]

Jed Brown <jed@59A2.org> writes:

>> I've checked a fix into the trunk.  Could you check if it works?
>
> Looks like you just removed "ruby" from the list so that I don't have
> to.  Works for me.

I also modified the other compilation regexps in order to do what ruby
regexp used to.