feat(eslint): fix 2 eslint warnings (#3268)

react/features/base/toolbox/components/AbstractButton.js

     }
 
     /**
-     * Helper function to be implemented by subclasses, which may return a new
-     * React Element to be appended at the end of the button.
+     * Helper function to be implemented by subclasses, which may return a
+     * new React Element to be appended at the end of the button.
      *
      * @protected
      * @returns {ReactElement|null}

react/features/recording/components/LiveStream/LiveStreamButton.web.js

     }
 
     /**
-     * Helper function to be implemented by subclasses, which returns a React
-     * Element to display (a beta tag) at the end of the button.
+     * Helper function to be implemented by subclasses, which returns
+     * a React Element to display (a beta tag) at the end of the button.
      *
      * @override
      * @protected