docs: fix typos

Closes #4308

modules/angular2/src/core/compiler/view_container_ref.ts

@@ -107,7 +107,7 @@ export class ViewContainerRef {
 
   /**
    * The method can be used together with insert to implement a view move, i.e.
-   * moving the dom nodes while the directives in the view stay intact.
+   * moving the DOM nodes while the directives in the view stay intact.
    */
   detach(atIndex: number = -1): ViewRef {
     if (atIndex == -1) atIndex = this.length - 1;

modules/angular2/src/core/debug/debug_element.ts

@@ -11,7 +11,7 @@ import {ElementRef} from 'angular2/src/core/compiler/element_ref';
 /**
  * A DebugElement contains information from the Angular compiler about an
  * element and provides access to the corresponding ElementInjector and
- * underlying dom Element, as well as a way to query for children.
+ * underlying DOM Element, as well as a way to query for children.
  */
 export class DebugElement {
   _elementInjector: ElementInjector;

modules/angular2/src/core/metadata/di.ts

@@ -97,7 +97,7 @@ export class AttributeMetadata extends DependencyMetadata {
  * }
  * ```
  *
- * A query can look for variable bindinds by passing in a string with desired binding symbol.
+ * A query can look for variable bindings by passing in a string with desired binding symbol.
  *
  * ### Example ([live demo](http://plnkr.co/edit/sT2j25cH1dURAyBRCKx1?p=preview))
  * ```html

modules/angular2/src/core/pipes/date_pipe.ts

@@ -49,7 +49,7 @@ var defaultLocale: string = 'en-US';
  *  | timezone  |   Z    | Z (GMT-8:00) | -                 | -         | -         |
  *
  * In javascript, only the components specified will be respected (not the ordering,
- * punctuations, ...) and details of the the formatting will be dependent on the locale.
+ * punctuations, ...) and details of the formatting will be dependent on the locale.
  * On the other hand in Dart version, you can also include quoted text as well as some extra
  * date/time components such as quarter. For more information see:
  * https://api.dartlang.org/apidocs/channels/stable/dartdoc-viewer/intl/intl.DateFormat.

modules/angular2/src/core/pipes/number_pipe.ts

@@ -59,7 +59,7 @@ export class NumberPipe {
  * WARNING: this pipe uses the Internationalization API.
  * Therefore it is only reliable in Chrome and Opera browsers.
  *
- * Formats a number as local text. i.e. group sizing and seperator and other locale-specific
+ * Formats a number as local text. i.e. group sizing and separator and other locale-specific
  * configurations are based on the active locale.
  *
  * # Usage