anchor.diff:            null,
             exampleAndAnalyzerCodeRequired &&
                     !frontendInternal &&
  -                  analyzerCode == null
  +                  analyzerCodes == null
                 ? "No analyzer code for $name."
                     "\nTry running"
                     " <BUILDDIR>/dart-sdk/bin/dartanalyzer --format=machine"
  
positive.code:       List<Example> examples = <Example>[];
        String externalTest;
        bool frontendInternal = false;
        String analyzerCode;
        Severity severity;
        YamlNode badSeverity;
        YamlNode unnecessarySeverity;
  
negative.code:             break;
  
            case "analyzerCode":
              analyzerCodes = value is String
                  ? <String>[value]
                  : new List<String>.from(value);
              break;
  
            case "bytes":
  