[gnome-text-editor] documentproperties: fix line count

[Christian Hergert <chergert src gnome org>]

commit eaf416c1c2ecbf2be46ff2bf44215cbb5b00d02e
Author: Christian Hergert <chergert redhat com>
Date:   Wed Jan 5 16:01:48 2022 -0800

    documentproperties: fix line count

 src/editor-properties-dialog.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/src/editor-properties-dialog.c b/src/editor-properties-dialog.c
index f3bc7cd..463f5d0 100644
--- a/src/editor-properties-dialog.c
+++ b/src/editor-properties-dialog.c
@@ -180,7 +180,7 @@ editor_properties_dialog_rescan (EditorPropertiesDialog *self)
   if (gtk_text_iter_equal (&begin, &end))
     lines = 0;
   else
-    lines = gtk_text_iter_get_line (&end) - gtk_text_iter_get_line (&begin);
+    lines = gtk_text_iter_get_line (&end) - gtk_text_iter_get_line (&begin) + 1;
 
   calculate_info (buffer,
                   &begin, &end,