# File lib/rspec/core/formatters/text_mate_formatter.rb, line 17
        def format_backtrace_line_for_textmate(line)
          return nil unless line
          CGI.escapeHTML(line).sub(/([^:]*\.e?rb):(\d*)/) do
            "<a href=\"txmt://open?url=file://#{File.expand_path($1)}&line=#{$2}\">#{$1}:#{$2}</a> "
          end
        end