Hello Rubyists,

I code ruby within emacs and I sometimes run scripts within emacs by 
running

   (shell-command-on-region (point-min) (point-max) "ruby -w")

When the script throws errors, emacs outputs lines like these in a 
buffer called "*Shell Command Output*:

 ./pdfobjects.rb:134:in `to_pdf': undefined method `in_list?' for 
0:Fixnum (NoMethodError)
	from ./pdfobjects.rb:133:in `to_pdf'
	from ./pdfobjects.rb:48:in `dictionary_writer'
	from ./pdfobjects.rb:39:in `dictionary_writer'
	from ./pdfobjects.rb:214:in `to_pdf'
	from ./pdflib.rb:112:in `to_s'
	from //opt/ruby/1.8.4/lib/ruby/1.8/delegate.rb:293:in `each_with_index'
	from ./pdflib.rb:108:in `to_s'
	from -:68:in `write_pdf'
	from -:75

Did anybody write an extension so these linenumbers are active? That 
would ease finding the right places.

Patrick

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