docs(di): fix incorrectly fomatted code blocks

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

@@ -734,6 +734,7 @@ export class Injector {
    * var car = injector.instantiateResolved(carBinding);
    * expect(car.engine).toBe(injector.get(Engine));
    * expect(car).not.toBe(injector.instantiateResolved(carBinding));
+   * ```
    */
   instantiateResolved(binding: ResolvedBinding): any {
     return this._instantiateBinding(binding, Visibility.PublicAndPrivate);

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

@@ -20,7 +20,6 @@ import {CONST} from 'angular2/src/core/facade/lang';
  *
  * Using an `OpaqueToken` is preferable to using an `Object` as tokens because it provides better
  * error messages.
- * ```
  */
 @CONST()
 export class OpaqueToken {