Docs: Replace multiple single line comments with multi-line comments.

This changeset updates various comments as per WordPress PHP Inline Documentation Standards.
See https://developer.wordpress.org/coding-standards/inline-documentation-standards/php/#5-inline-comments.

Follow-up to [56174], [56175], [56176], [56177], [56178], [56179].

Props costdev, audrasjb.
See #58459.



Built from https://develop.svn.wordpress.org/trunk@56180


git-svn-id: http://core.svn.wordpress.org/trunk@55692 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/cron.php

@@ -541,8 +541,10 @@ function wp_unschedule_event( $timestamp, $hook, $args = array(), $wp_error = fa
  *                            if unscheduling one or more events fail.
  */
 function wp_clear_scheduled_hook( $hook, $args = array(), $wp_error = false ) {
-	// Backward compatibility.
-	// Previously, this function took the arguments as discrete vars rather than an array like the rest of the API.
+	/*
+	 * Backward compatibility.
+	 * Previously, this function took the arguments as discrete vars rather than an array like the rest of the API.
+	 */
 	if ( ! is_array( $args ) ) {
 		_deprecated_argument( __FUNCTION__, '3.0.0', __( 'This argument has changed to an array to match the behavior of the other cron functions.' ) );
 		$args     = array_slice( func_get_args(), 1 ); // phpcs:ignore PHPCompatibility.FunctionUse.ArgumentFunctionsReportCurrentValue.NeedsInspection