# File lib/rspec/core/formatters/text_mate_formatter.rb, line 8
        def backtrace_line(line)
          if line = super(line)
            line.sub!(/([^:]*\.rb):(\d*)/) do
              "<a href=\"txmt://open?url=file://#{File.expand_path($1)}&line=#{$2}\">#{$1}:#{$2}</a> "
            end
          end
        end