Docs: Fix typo in a comment in wp_trim_excerpt().

Includes removing redundant `@covers` tags. There is already an existing annotation for the whole test class, following the [https://docs.phpunit.de/en/9.6/annotations.html#covers PHPUnit recommendation]:
> This annotation can be added to the docblock of the test class or the individual test methods. The recommended way is to add the annotation to the docblock of the test class, not to the docblock of the test methods.

Follow-up to [56560].

See #58682.

git-svn-id: https://develop.svn.wordpress.org/trunk@56561 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/formatting.php

@@ -3984,7 +3984,7 @@ function wp_trim_excerpt( $text = '', $post = null ) {
 
 		/*
 		 * Temporarily unhook do_blocks() since excerpt_remove_blocks( $text )
-		 * handels block rendering needed for excerpt.
+		 * handles block rendering needed for excerpt.
 		 */
 		$filter_block_removed = remove_filter( 'the_content', 'do_blocks', 9 );
 

tests/phpunit/tests/formatting/wpTrimExcerpt.php

@@ -153,8 +153,6 @@ public function test_wp_trim_excerpt_does_not_restore_wp_filter_content_tags_if_
 	 * Tests that `wp_trim_excerpt()` does process valid blocks.
 	 *
 	 * @ticket 58682
-	 *
-	 * @covers ::wp_trim_excerpt
 	 */
 	public function test_wp_trim_excerpt_check_if_block_renders() {
 		$post = self::factory()->post->create(
@@ -172,8 +170,6 @@ public function test_wp_trim_excerpt_check_if_block_renders() {
 	 * Tests that `wp_trim_excerpt()` unhooks `do_blocks()` from 'the_content' filter.
 	 *
 	 * @ticket 58682
-	 *
-	 * @covers ::wp_trim_excerpt
 	 */
 	public function test_wp_trim_excerpt_unhooks_do_blocks() {
 		$post = self::factory()->post->create();
@@ -200,8 +196,6 @@ static function( $content ) use ( &$has_filter ) {
 	 * Tests that `wp_trim_excerpt()` doesn't permanently unhook `do_blocks()` from 'the_content' filter.
 	 *
 	 * @ticket 58682
-	 *
-	 * @covers ::wp_trim_excerpt
 	 */
 	public function test_wp_trim_excerpt_should_not_permanently_unhook_do_blocks() {
 		$post = self::factory()->post->create();
@@ -215,8 +209,6 @@ public function test_wp_trim_excerpt_should_not_permanently_unhook_do_blocks() {
 	 * Tests that `wp_trim_excerpt()` doesn't restore `do_blocks()` if it was previously unhooked.
 	 *
 	 * @ticket 58682
-	 *
-	 * @covers ::wp_trim_excerpt
 	 */
 	public function test_wp_trim_excerpt_does_not_restore_do_blocks_if_previously_unhooked() {
 		$post = self::factory()->post->create();