Docs: Improve inline comments per the documentation standards.

Includes minor code layout fixes for better readability.

See #48303.
Built from https://develop.svn.wordpress.org/trunk@47122


git-svn-id: http://core.svn.wordpress.org/trunk@46922 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/functions.wp-scripts.php

@@ -74,7 +74,7 @@ function wp_print_scripts( $handles = false ) {
 	 * @since 2.1.0
 	 */
 	do_action( 'wp_print_scripts' );
-	if ( '' === $handles ) { // for wp_head
+	if ( '' === $handles ) { // For 'wp_head'.
 		$handles = false;
 	}