diff --git a/packages/core/src/change_detection/change_detector_ref.ts b/packages/core/src/change_detection/change_detector_ref.ts
index ee01d95916..a5dcd55599 100644
--- a/packages/core/src/change_detection/change_detector_ref.ts
+++ b/packages/core/src/change_detection/change_detector_ref.ts
@@ -28,7 +28,7 @@ export abstract class ChangeDetectorRef {
    *
    *   constructor(private ref: ChangeDetectorRef) {
    *     setInterval(() => {
-   *       this.numberOfTicks ++
+   *       this.numberOfTicks++;
    *       // the following is required, otherwise the view will not be updated
    *       this.ref.markForCheck();
    *     }, 1000);
@@ -78,11 +78,11 @@ export abstract class ChangeDetectorRef {
    * @Component({
    *   selector: 'giant-list',
    *   template: `
-   *     <li *ngFor="let d of dataProvider.data">Data {{d}}</lig>
+   *     <li *ngFor="let d of dataProvider.data">Data {{d}}</li>
    *   `,
    * })
    * class GiantList {
-   *   constructor(private ref: ChangeDetectorRef, private dataProvider:DataProvider) {
+   *   constructor(private ref: ChangeDetectorRef, private dataProvider: DataProvider) {
    *     ref.detach();
    *     setInterval(() => {
    *       this.ref.detectChanges();
@@ -166,13 +166,14 @@ export abstract class ChangeDetectorRef {
    *   template: 'Data: {{dataProvider.data}}'
    * })
    * class LiveData {
-   *   constructor(private ref: ChangeDetectorRef, private dataProvider:DataProvider) {}
+   *   constructor(private ref: ChangeDetectorRef, private dataProvider: DataProvider) {}
    *
    *   set live(value) {
-   *     if (value)
+   *     if (value) {
    *       this.ref.reattach();
-   *     else
+   *     } else {
    *       this.ref.detach();
+   *     }
    *   }
    * }
    *