message: Fix final eslint-plugin-jsx-a11y issues
diff: @@ -331,6 +331,7 @@ class Generator extends preact.Component {
  {isDebugMode() ? (
  <div id="content-container" className="box">
  <iframe
  + title="Debug preview"
  id="pdf-viewer"
  src={this.state.blob_url}
  className={this.state.blob_url ? '' : 'empty'}
  