    # File lib/merb-core/dispatch/default_exception/default_exception.rb, line 77
            def render_source(filename, line)
              line = line.to_i
              ret   =  []
              ret   << "<tr class='source'>"
              ret   << "  <td class='collapse'></td>"
              str   =  "  <td class='code' colspan='2'><div>"

              __caller_lines__(filename, line, 5) do |lline, lcode|
                str << textmate_url(filename, lline)
                str << "<em>" if line == lline
                str << Erubis::XmlHelper.escape_xml(lcode)
                str << "</em>" if line == lline
                str << "\n"
              end
              str   << "</div></td>"
              ret   << str
              ret   << "</tr>"
              ret.join("\n")
            end