anchor.diff:        print("Serving $REQUEST_PATH on http://${HOST}:${PORT}.");
       });
   
  -  } on Exception catch(err, st){
  +  } catch(err, st){
       print(err);
       print(st);
     }
  
positive.code:     if (LOG_REQUESTS) print(createSessionLog(request).toString());
      htmlResponse = createHtmlResponse(request).toString();
  //  if (LOG_REQUESTS) print(createSessionLog(request, session).toString());
    } on Exception catch (err) {
      htmlResponse = createErrorPage(err.toString()).toString();
    }
    response.headers.add("Content-Type", "text/html; charset=UTF-8");
    response.write(htmlResponse);
  
negative.code:       </head>
        <body>
          <h1> *** Internal Error ***</h1><br>
          <pre>Server rejected this request: '''
            '''${makeSafe(new StringBuffer(errorMessage)).toString()}</pre><br>
        </body>
      </html>''');
  }
  