1. switched the following languages to use a magic heredoc token instead of a comment
2. there was one way to trigger ruby scope, by have a heredoc token of *_EVAL
     now, there are two options:
       a. foobar = <<-RUBY
       b. eval <<-FOOBAR # works with eval, module_eval and class_eval

TODO:
 * support <<-'HEREDOC' or <<-"HEREDOC" syntax for magic tokens for embedded languages
 * support <<HEREDOC magic tokens for embedded languages

patch is attached, and can be found here: http://pastie.org/394164