code: function renderSummary(totalErrors, totalWarnings) {
    var totalProblems = totalErrors + totalWarnings;
    var renderedText = totalProblems + ' ' + pluralize('problem', totalProblems);
  
    if (totalProblems !== 0) {
      renderedText += ' (' + totalErrors + ' ' + pluralize('error', totalErrors) + ', ' + totalWarnings + ' ' + pluralize('warning', totalWarnings) + ')';
    }
    return renderedText;
  }
docs: Renders text along the template of x problems (x errors, x warnings)
  @param {string} totalErrors Total errors
  @param {string} totalWarnings Total warnings
  @returns {string} The formatted string, pluralized where necessary