As a response to: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=21008

It should be noted that if CSS3 isn't already touring complete, there
are lots of CSS superset languages (LESS [1], SASS [2], etc) which
definitely are touring-complete and whose Emacs-modes do derive from css-
mode. As an emacs-user I would expect those modes to invoke my prog-mode
hooks without me manually having to wire them up.

So I don't think there is any doubt that erring on the side of prog-mode
is the right thing to do (tm).

While this isn't really a big deal to me, I agree with Vasilij that
consistency would be nice.

As for file revision history, last time I checked git manages to track
moved files just fine without messing up the history, so I don't see a
technical reason to avoid fixing this up.

[1] https://github.com/myfreeweb/less-mode/blob/master/less-mode.el#L75

[2] https://github.com/antonj/scss-mode/blob/master/scss-mode.el#L87

--
Jostein Kjønigsen
jostein@kjonigsen.net / jostein@secure.kjonigsen.net