bug#17057: 24.3.50; [ruby-mode] Font-locking of special global variables like $$ is broken(missing)

[Dmitry Gutov]

Bozhidar Batsov <bozhidar@batsov.com> writes:

> Here's a few examples:
>
> "this is #$$"
>
> var = $!
>
> Things are different for:
>
> "this is #$1"
>
> var = $1

Have you tried it in the latest Emacs? For me, only one example

"this is #$$"

is not highlighted (I'll fix that).

> There's another thing to consider - do built-in global vars should be
> font-locked like built-ins or like the other (user-defined) global
> variables? Personally I'd font-lock them as built-in to underline their
> significance.

Hmmm, maybe. But we also highlight nil, self, true, false, __LINE__,
__ENCODING__ and __FILE__ with font-lock-variable-name-face. Should we
change these, too?