Apply suggestions from code review

Co-authored-by: Robert Knight <robertknight@gmail.com>

src/shared/listener-collection.js

@@ -16,7 +16,7 @@ export class ListenerCollection {
   }
 
   /**
-   * Adds a listener and returns a listenerId
+   * Add a listener and return an ID that can be used to remove it later
    *
    * @param {Listener['eventTarget']} eventTarget
    * @param {Listener['eventType']} eventType
@@ -31,7 +31,8 @@ export class ListenerCollection {
   }
 
   /**
-   * Removes a listener using a listenerId
+   * Remove a listener using a listenerId
+   *
    * @param {Symbol} listenerId
    */
   remove(listenerId) {

src/shared/test/listener-collection-test.js

@@ -22,7 +22,7 @@ describe('ListenerCollection', () => {
   });
 
   describe('#remove', () => {
-    it('unregisters some event listeners', () => {
+    it('unregisters the specified listener', () => {
       const listener1 = sinon.stub();
       const listener2 = sinon.stub();
       listeners.add(window, 'resize', listener1);