[SVN] Revision 1251 (Ruby)

[Chris Thomas]

• Tweak heredocs to trigger for assignment (x = <<end) only. Other cases can be added, but will have to be highly specific to avoid snagging the << operator. I don't think heredocs can ever be 100% perfect without actually running a ruby interpreter so we can introspect the token on the left-hand-side. 
• Full %r support. 
• Replace instances of source.ruby with $base.

Changed:
U   trunk/Bundles/Ruby.tmbundle/Syntaxes/Ruby.plist