[gnome-builder/wip/gtk4-port] plugins/omni-gutter: tweak spacing a bit

[Christian Hergert <chergert src gnome org>]

commit c3b21a2ad57e9e37a835d1f01b4ca239a193f4e6
Author: Christian Hergert <chergert redhat com>
Date:   Tue Apr 26 18:02:16 2022 -0700

    plugins/omni-gutter: tweak spacing a bit

 src/plugins/omni-gutter/gbp-omni-gutter-renderer.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/src/plugins/omni-gutter/gbp-omni-gutter-renderer.c 
b/src/plugins/omni-gutter/gbp-omni-gutter-renderer.c
index b5ea3386e..0a993ad90 100644
--- a/src/plugins/omni-gutter/gbp-omni-gutter-renderer.c
+++ b/src/plugins/omni-gutter/gbp-omni-gutter-renderer.c
@@ -809,7 +809,7 @@ gbp_omni_gutter_renderer_begin (GtkSourceGutterRenderer *renderer,
   /* Create a new layout for rendering lines to */
   self->layout = gtk_widget_create_pango_layout (GTK_WIDGET (self), "");
   pango_layout_set_alignment (self->layout, PANGO_ALIGN_RIGHT);
-  pango_layout_set_width (self->layout, (width - CHANGE_WIDTH) * PANGO_SCALE);
+  pango_layout_set_width (self->layout, (width - CHANGE_WIDTH - 2) * PANGO_SCALE);
 }
 
 static gboolean