docs(core): fix typo in animation docs

modules/@angular/animation/src/dsl/animation_trigger.ts

@@ -56,12 +56,12 @@ import {validateAnimationSequence} from './animation_validator_visitor';
  * ```
  *
  * The template associated with this component will make use of the `myAnimationTrigger` animation
- trigger by binding to an element within its template code.
+ * trigger by binding to an element within its template code.
  *
  * ```html
  * <!-- somewhere inside of my-component-tpl.html -->
  * <div [@myAnimationTrigger]="myStatusExp">...</div>
- tools/gulp-tasks/validate-commit-message.js ```
+ * ```
  *
  * {@example core/animation/ts/dsl/animation_example.ts region='Component'}
  *