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.




git-svn-id: https://develop.svn.wordpress.org/trunk@56180 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/class-wp-user.php

@@ -199,8 +199,7 @@ class WP_User {
 		}
 
 		if ( 'id' === $field ) {
-			// Make sure the value is numeric to avoid casting objects, for example,
-			// to int 1.
+			// Make sure the value is numeric to avoid casting objects, for example, to int 1.
 			if ( ! is_numeric( $value ) ) {
 				return false;
 			}