Simon Strandgaard <neoneye / adslhome.dk> wrote in message news:<pan.2004.02.11.22.14.00.280299 / adslhome.dk>...
> BTW:  It would be really nice with a syntax hiliter that could understand
> the HEREDOC sections in Ruby code. For instance a "EOHTML" heredoc, could be
> interpreted as HTML. Similar with EOXML, EORUBY, EOTEXT.

It isn't a syntax hiliter for display but... Emacs has the mmm-mode
project which turns on different major modes within the same buffer
based upon start-end region regexps.