Ticket #47078: 47078.1.diff

Gruntfile.js

@@ -501 +501 @@
                                         'wp-admin/css/*.css',
                                         'wp-includes/css/*.css',
 
+                                        // Exclude minified and already processed files, and files from external packages.
+                                        // These are present when running `grunt build` after `grunt --dev`.
+                                        '!wp-admin/css/*-rtl.css',
+                                        '!wp-includes/css/*-rtl.css',
+                                        '!wp-admin/css/*.min.css',
+                                        '!wp-includes/css/*.min.css',
+                                        '!wp-includes/css/dist',
+
                                         // Exceptions
                                         '!wp-includes/css/dashicons.css',
                                         '!wp-includes/css/wp-embed-template.css',