--- a/wp/wp-admin/includes/theme-install.php	Tue Dec 15 15:52:01 2020 +0100
+++ b/wp/wp-admin/includes/theme-install.php	Wed Sep 21 18:19:35 2022 +0200
@@ -183,7 +183,7 @@
 <form method="post" enctype="multipart/form-data" class="wp-upload-form" action="<?php echo self_admin_url( 'update.php?action=upload-theme' ); ?>">
 	<?php wp_nonce_field( 'theme-upload' ); ?>
 	<label class="screen-reader-text" for="themezip"><?php _e( 'Theme zip file' ); ?></label>
-	<input type="file" id="themezip" name="themezip" accept=".zip"/>
+	<input type="file" id="themezip" name="themezip" accept=".zip" />
 	<?php submit_button( __( 'Install Now' ), '', 'install-theme-submit', false ); ?>
 </form>
 	<?php