diff -r 3d4e9c994f10 -r a86126ab1dd4 wp/wp-includes/ms-default-constants.php
--- a/wp/wp-includes/ms-default-constants.php	Tue Oct 22 16:11:46 2019 +0200
+++ b/wp/wp-includes/ms-default-constants.php	Tue Dec 15 13:49:49 2020 +0100
@@ -23,7 +23,7 @@
 		return;
 	}
 
-	// Base uploads dir relative to ABSPATH
+	// Base uploads dir relative to ABSPATH.
 	if ( ! defined( 'UPLOADBLOGSDIR' ) ) {
 		define( 'UPLOADBLOGSDIR', 'wp-content/blogs.dir' );
 	}
@@ -35,8 +35,8 @@
 
 		define( 'UPLOADS', UPLOADBLOGSDIR . '/' . $site_id . '/files/' );
 
-		// Uploads dir relative to ABSPATH
-		if ( 'wp-content/blogs.dir' == UPLOADBLOGSDIR && ! defined( 'BLOGUPLOADDIR' ) ) {
+		// Uploads dir relative to ABSPATH.
+		if ( 'wp-content/blogs.dir' === UPLOADBLOGSDIR && ! defined( 'BLOGUPLOADDIR' ) ) {
 			define( 'BLOGUPLOADDIR', WP_CONTENT_DIR . '/blogs.dir/' . $site_id . '/files/' );
 		}
 	}
@@ -124,9 +124,6 @@
  * we will have translations loaded and can trigger warnings easily.
  *
  * @since 3.0.0
- *
- * @staticvar bool $subdomain_error
- * @staticvar bool $subdomain_error_warn
  */
 function ms_subdomain_constants() {
 	static $subdomain_error      = null;
@@ -155,7 +152,7 @@
 
 	if ( defined( 'SUBDOMAIN_INSTALL' ) && defined( 'VHOST' ) ) {
 		$subdomain_error = true;
-		if ( SUBDOMAIN_INSTALL !== ( 'yes' == VHOST ) ) {
+		if ( SUBDOMAIN_INSTALL !== ( 'yes' === VHOST ) ) {
 			$subdomain_error_warn = true;
 		}
 	} elseif ( defined( 'SUBDOMAIN_INSTALL' ) ) {
@@ -163,7 +160,7 @@
 		define( 'VHOST', SUBDOMAIN_INSTALL ? 'yes' : 'no' );
 	} elseif ( defined( 'VHOST' ) ) {
 		$subdomain_error = true;
-		define( 'SUBDOMAIN_INSTALL', 'yes' == VHOST );
+		define( 'SUBDOMAIN_INSTALL', 'yes' === VHOST );
 	} else {
 		$subdomain_error = false;
 		define( 'SUBDOMAIN_INSTALL', false );