Code Modernization: Rename parameters that use reserved keywords in `…

…phpunit/tests/shortcode.php`.

While using reserved PHP keywords as parameter name labels is allowed, in the context of function calls using named parameters in PHP 8.0+, this will easily lead to confusion. To avoid that, it is recommended not to use reserved keywords as function parameter names.

This commit:
* Renames the `$return` parameter to `$output` in:
 * `Tests_Shortcode::filter_pre_do_shortcode_tag_attr()`
 * `Tests_Shortcode::filter_do_shortcode_tag_replace()`
 * `Tests_Shortcode::filter_do_shortcode_tag_generate()`
 * `Tests_Shortcode::filter_do_shortcode_tag_attr()`
* Amends the `$return` parameter of the `pre_do_shortcode_tag` filter for consistency.

Follow-up to [52946], [52996], [52997], [52998], [53003], [53014], [53029], [53039], [53116], [53117], [53137], [53174], [53184], [53185], [53192], [53193], [53198], [53203], [53207], [53215], [53216], [53220], [53230], [53232], [53236], [53239], [53240], [53242], [53243], [53245], [53246], [53257], [53269], [53270], [53271], [53272], [53273], [53274], [53275], [53276], [53277], [53281], [53283], [53284], [53285], [53287], [53364], [53365], [54927], [54929], [54930], [54931], [54932], [54933], [54938], [54943], [54944], [54945], [54946], [54947], [54948], [54950], [54951], [54952], [54956], [54959], [54960], [54961], [54962], [54964], [54965], [54969], [54970], [54971], [54972], [54996], [55000], [55011], [55013], [55014], [55015], [55016], [55017], [55020], [55021], [55023], [55027], [55028], [55034], [55036], [55037], [55038], [55039], [55049], [55050], [55060], [55062], [55064], [55065], [55076], [55077], [55078], [55081], [55090], [55100], [55104], [55112], [55115], [55116], [55117].

Props jrf, aristath, poena, justinahinon, SergeyBiryukov.
See #56788.

git-svn-id: https://develop.svn.wordpress.org/trunk@55119 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/shortcodes.php

@@ -340,7 +340,7 @@ function do_shortcode_tag( $m ) {
 	 *
 	 * @since 4.7.0
 	 *
-	 * @param false|string $return Short-circuit return value. Either false or the value to replace the shortcode with.
+	 * @param false|string $output Short-circuit return value. Either false or the value to replace the shortcode with.
 	 * @param string       $tag    Shortcode name.
 	 * @param array|string $attr   Shortcode attributes array or empty string.
 	 * @param array        $m      Regular expression match array.

tests/phpunit/tests/shortcode.php

@@ -826,7 +826,7 @@ public function test_pre_do_shortcode_tag() {
 
 		// Pass arguments.
 		$arr = array(
-			'return' => 'p11',
+			'output' => 'p11',
 			'key'    => $str,
 			'atts'   => array(
 				'a' => 'b',
@@ -864,9 +864,9 @@ public function filter_pre_do_shortcode_tag_p11() {
 		return 'p11';
 	}
 
-	public function filter_pre_do_shortcode_tag_attr( $return, $key, $atts, $m ) {
+	public function filter_pre_do_shortcode_tag_attr( $output, $key, $atts, $m ) {
 		$arr = array(
-			'return' => $return,
+			'output' => $output,
 			'key'    => $key,
 			'atts'   => $atts,
 			'm'      => $m,
@@ -896,7 +896,7 @@ public function test_do_shortcode_tag_filter() {
 
 		// Pass arguments.
 		$arr = array(
-			'return' => 'foobar',
+			'output' => 'foobar',
 			'key'    => $str,
 			'atts'   => array(
 				'a' => 'b',
@@ -926,17 +926,17 @@ public function shortcode_do_shortcode_tag( $atts = array(), $content = '' ) {
 		return 'foo';
 	}
 
-	public function filter_do_shortcode_tag_replace( $return ) {
-		return str_replace( 'oo', 'ee', $return );
+	public function filter_do_shortcode_tag_replace( $output ) {
+		return str_replace( 'oo', 'ee', $output );
 	}
 
-	public function filter_do_shortcode_tag_generate( $return ) {
+	public function filter_do_shortcode_tag_generate( $output ) {
 		return 'foobar';
 	}
 
-	public function filter_do_shortcode_tag_attr( $return, $key, $atts, $m ) {
+	public function filter_do_shortcode_tag_attr( $output, $key, $atts, $m ) {
 		$arr = array(
-			'return' => $return,
+			'output' => $output,
 			'key'    => $key,
 			'atts'   => $atts,
 			'm'      => $m,