Ticket #26094: 26094.3.patch

src/wp-includes/formatting.php

@@ -873 +873 @@
          */
         $special_chars = apply_filters( 'sanitize_file_name_chars', $special_chars, $filename_raw );
         $filename = str_replace($special_chars, '', $filename);
-        $filename = preg_replace('/[\s-]+/', '-', $filename);
+        $filename = preg_replace('/[\r\n\t -]+/', '-', $filename);
         $filename = trim($filename, '.-_');
 
         // Split the filename into a base and extension[s]