Ticket #49402: 49402.patch

src/wp-includes/widgets/class-wp-widget-custom-html.php

@@ -47 +47 @@
                         'customize_selective_refresh' => true,
                 );
                 $control_ops = array(
-                        'width'  => 400,
+                        'width'  => 370,
                         'height' => 350,
                 );
                 parent::__construct( 'custom_html', __( 'Custom HTML' ), $widget_ops, $control_ops );