docs(modal): fix trailing space

Author: mhartington

src/components/modal/modal-controller.ts

@@ -114,7 +114,7 @@ import { DeepLinker } from '../../navigation/deep-linker';
  * ```
  *
  * A common issue is that a developer may try to implement navigation in a modal, but when you try NavController.push(),
- * you will notice that the status bar on iOS gets cut off. The proper way to implement navigation in a modal is to 
+ * you will notice that the status bar on iOS gets cut off. The proper way to implement navigation in a modal is to
  * make the modal component a navigation container, and set the root page to the page you want to show in your modal.
  *
  * ```ts
@@ -124,7 +124,7 @@ import { DeepLinker } from '../../navigation/deep-linker';
  * export class MyModalWrapper {
  *   rootPage = 'MyModalContentPage'; // This is the page you want your modal to display
  *   rootParams;
- * 
+ *
  *   constructor(navParams: NavParams, private viewCtrl: ViewController) {
  *       this.rootParams = Object.assign({}, navParams.data, {viewCtrl: viewCtrl});
  *       // This line will send the view controller into your child views, so you can dismiss the modals from there.