# File lib/ruby-prof/printers/graph_html_printer.rb, line 67
    def file_link(path, linenum)
      srcfile = File.expand_path(path)
      if srcfile =~ /\/ruby_runtime$/
        ""
      else
        if RUBY_PLATFORM =~ /darwin/
          "<a href=\"txmt://open?url=file://#{h srcfile}&line=#{linenum}\" title=\"#{h srcfile}:#{linenum}\">#{linenum}</a>"
        else
          "<a href=\"file://#{h srcfile}##{linenum}\" title=\"#{h srcfile}:#{linenum}\">#{linenum}</a>"
        end
      end
    end