code: function truncFilename(path, rootFolderName) {
      // bail if a string wasn't provided
      if (typeof path !== 'string') {
          return path;
      }
  
      var index = path.indexOf(rootFolderName);
      if (index > 0) {
          return path.substring(index + rootFolderName.length + 1);
      } else {
          return path;
      }
  }
docs: shortens the file name to exclude any path before the project folder name @param path: file path string. e.g. /home/mark/myproj/run.js @param rootFolderName: root folder for the project. e.g. "myproj" @return the shortened file path string