anchor.diff:  
   [source,shell]
   ----------------------------------------------------------------------
  -cd tests
  -. env/bin/activate
  -nosetests test_0025_mongodb_basic.py:Test.test_write_errors
  -----------------------------------------------------------------------
  +$ cd tests
  +$ . env/bin/activate
  +$ nosetests test_0025_mongodb_basic.py:Test.test_write_errors
  +----------------------------------------------------------------------
  +
  +After running the individual test, you can check the logs, the output and
  +configuration file manually by looking into the folder pointed by the `last_run`
  +symlink:
  +
  +[source,shell]
  +----------------------------------------------------------------------
  +$ cd last_run
  +$ ls
  +output packetbeat.log packetbeat.yml
  +----------------------------------------------------------------------
  
positive.code: 		mc := common.MapStr{}
  		event["memcache"] = mc
  
      ...
  
  		return nil
  	}
  
negative.code: 	keyLen, _ := header.ReadNetUint16At(2)
  	totalLen, _ := header.ReadNetUint32At(8)
  
      [...]
  
  	if extraLen > 0 {
  		tmp, _ := buf.Collect(int(extraLen))
  