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], [56180], [56191], [56192], [56193].

Props costdev, audrasjb.
See #58459.



Built from https://develop.svn.wordpress.org/trunk@56194


git-svn-id: http://core.svn.wordpress.org/trunk@55706 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/template.php

@@ -470,8 +470,10 @@ function get_page_template() {
 	$pagename = get_query_var( 'pagename' );
 
 	if ( ! $pagename && $id ) {
-		// If a static page is set as the front page, $pagename will not be set.
-		// Retrieve it from the queried object.
+		/*
+		 * If a static page is set as the front page, $pagename will not be set.
+		 * Retrieve it from the queried object.
+		 */
 		$post = get_queried_object();
 		if ( $post ) {
 			$pagename = $post->post_name;