Fix jsdocs. Simplify the source code

react/features/app/components/AbstractApp.js

         // The consumer of this AbstractApp did not provide a Redux store.
         if (typeof nextProps.store === 'undefined'
 
-                // The consumer of this AbstractApp  did provide a Redux store
+                // The consumer of this AbstractApp did provide a Redux store
                 // before. Which means that the consumer changed their mind. In
                 // such a case this instance should create its own internal
                 // Redux store. If the consumer did not provide a Redux store

react/features/app/components/App.native.js

      * @private
      * @returns {void}
      */
-    _onLinkingURL(event) {
-        this._openURL(event.url);
+    _onLinkingURL({ url }) {
+        this._openURL(url);
     }
 }
 

react/features/app/middleware.js

 
 /**
  * Notifies the feature app that the action {@link CONNECTION_ESTABLISHED} is
- * being dispatched within a specific Redux {@code store}.
+ * being dispatched within a specific redux {@code store}.
  *
- * @param {Store} store - The Redux store in which the specified {@code action}
+ * @param {Store} store - The redux store in which the specified {@code action}
  * is being dispatched.
- * @param {Dispatch} next - The Redux {@code dispatch} function to dispatch the
+ * @param {Dispatch} next - The redux {@code dispatch} function to dispatch the
  * specified {@code action} to the specified {@code store}.
- * @param {Action} action - The Redux action {@code CONNECTION_ESTABLISHED}
+ * @param {Action} action - The redux action {@code CONNECTION_ESTABLISHED}
  * which is being dispatched in the specified {@code store}.
  * @private
  * @returns {Object} The new state that is the result of the reduction of the

react/index.native.js

         // precedence.
         if (typeof this.props.url === 'undefined') {
             Linking.getInitialURL()
-                .then(url => {
-                    this.setState({ url });
-                })
+                .then(url => this.setState({ url }))
                 .catch(err => {
                     console.error('Failed to get initial URL', err);
 
-                    // Start with an empty URL if getting the initial URL fails
+                    // Start with an empty URL if getting the initial URL fails;
                     // otherwise, nothing will be rendered.
                     this.setState({ url: null });
                 });