anchor.diff:      Task task,
       String pkgPath,
       String outputDir,
  -    Map<String, String> environment,
       StringBuffer logFileOutput,
     ) async {
       logFileOutput.write('Running dartdoc:\n');
  
positive.code: 
        bool hasContent = false;
        if (depsResolved) {
          final dartdocEnv = {'PUB_CACHE': pubCacheDir};
          hasContent = await _generateDocs(
              task, pkgPath, outputDir, dartdocEnv, logFileOutput);
        }
  
        if (hasContent) {
  
negative.code:         _excludedLibraries.join(','),
        ],
        workingDirectory: pkgPath,
      );
      _appendLog(logFileOutput, pr);
  
  