docs(documentation): cosmetically improve the documentation

packages/ionic-angular/src/components/action-sheet/action-sheet-controller.ts

@@ -39,10 +39,10 @@ import { Config } from '../../config/config';
  *
  * export class MyClass{
  *
- *  constructor(public actionSheetCtrl: ActionSheetController) {}
+ *  constructor(public actionSheetCtrl: ActionSheetController) { }
  *
  *  presentActionSheet() {
- *    let actionSheet = this.actionSheetCtrl.create({
+ *    const actionSheet = this.actionSheetCtrl.create({
  *      title: 'Modify your album',
  *      buttons: [
  *        {
@@ -115,14 +115,14 @@ import { Config } from '../../config/config';
  * out first, *then* start the next transition.
  *
  * ```ts
- * let actionSheet = this.actionSheetCtrl.create({
+ * const actionSheet = this.actionSheetCtrl.create({
  *   title: 'Hello',
  *   buttons: [{
  *     text: 'Ok',
  *     handler: () => {
  *       // user has clicked the action sheet button
  *       // begin the action sheet's dimiss transition
- *       let navTransition = actionSheet.dismiss();
+ *       const navTransition = actionSheet.dismiss();
  *
  *       // start some async method
  *       someAsyncOperation().then(() => {

packages/ionic-angular/src/components/alert/alert-controller.ts

@@ -51,12 +51,10 @@ import { Config } from '../../config/config';
  * ```ts
  * import { AlertController } from 'ionic-angular';
  *
- * constructor(private alertCtrl: AlertController) {
- *
- * }
+ * constructor(private alertCtrl: AlertController) { }
  *
  * presentAlert() {
- *   let alert = this.alertCtrl.create({
+ *   const alert = this.alertCtrl.create({
  *     title: 'Low battery',
  *     subTitle: '10% of battery remaining',
  *     buttons: ['Dismiss']
@@ -65,7 +63,7 @@ import { Config } from '../../config/config';
  * }
  *
  * presentConfirm() {
- *   let alert = this.alertCtrl.create({
+ *   const alert = this.alertCtrl.create({
  *     title: 'Confirm purchase',
  *     message: 'Do you want to buy this book?',
  *     buttons: [
@@ -88,7 +86,7 @@ import { Config } from '../../config/config';
  * }
  *
  * presentPrompt() {
- *   let alert = this.alertCtrl.create({
+ *   const alert = this.alertCtrl.create({
  *     title: 'Login',
  *     inputs: [
  *       {
@@ -181,14 +179,14 @@ import { Config } from '../../config/config';
  * out first, *then* start the next transition.
  *
  * ```ts
- * let alert = this.alertCtrl.create({
+ * const alert = this.alertCtrl.create({
  *   title: 'Hello',
  *   buttons: [{
  *     text: 'Ok',
  *     handler: () => {
  *       // user has clicked the alert button
  *       // begin the alert's dismiss transition
- *       let navTransition = alert.dismiss();
+ *       const navTransition = alert.dismiss();
  *
  *       // start some async method
  *       someAsyncOperation().then(() => {

packages/ionic-angular/src/components/loading/loading-controller.ts

@@ -49,12 +49,10 @@ import { LoadingOptions } from './loading-options';
  * ```ts
  * import { LoadingController } from 'ionic-angular';
  *
- * constructor(public loadingCtrl: LoadingController) {
- *
- * }
+ * constructor(public loadingCtrl: LoadingController) { }
  *
  * presentLoadingDefault() {
- *   let loading = this.loadingCtrl.create({
+ *   const loading = this.loadingCtrl.create({
  *     content: 'Please wait...'
  *   });
  *
@@ -66,7 +64,7 @@ import { LoadingOptions } from './loading-options';
  * }
  *
  * presentLoadingCustom() {
- *   let loading = this.loadingCtrl.create({
+ *   const loading = this.loadingCtrl.create({
  *     spinner: 'hide',
  *     content: `
  *       <div class="custom-spinner-container">
@@ -83,7 +81,7 @@ import { LoadingOptions } from './loading-options';
  * }
  *
  * presentLoadingText() {
- *   let loading = this.loadingCtrl.create({
+ *   const loading = this.loadingCtrl.create({
  *     spinner: 'hide',
  *     content: 'Loading Please Wait...'
  *   });

packages/ionic-angular/src/components/modal/modal-controller.ts

@@ -38,12 +38,10 @@ import { DeepLinker } from '../../navigation/deep-linker';
  * @Component(...)
  * class HomePage {
  *
- *  constructor(public modalCtrl: ModalController) {
- *
- *  }
+ *  constructor(public modalCtrl: ModalController) { }
  *
  *  presentProfileModal() {
- *    let profileModal = this.modalCtrl.create(Profile, { userId: 8675309 });
+ *    const profileModal = this.modalCtrl.create(Profile, { userId: 8675309 });
  *    profileModal.present();
  *  }
  *

packages/ionic-angular/src/components/toast/toast-controller.ts

@@ -37,12 +37,10 @@ import { ToastOptions } from './toast-options';
  *
  * @usage
  * ```ts
- * constructor(private toastCtrl: ToastController) {
- *
- * }
+ * constructor(private toastCtrl: ToastController) { }
  *
  * presentToast() {
- *   let toast = this.toastCtrl.create({
+ *   const toast = this.toastCtrl.create({
  *     message: 'User was added successfully',
  *     duration: 3000,
  *     position: 'top'