[gnome-text-editor] spellcheck: fix invalidation region when applying checker

[Christian Hergert <chergert src gnome org>]

commit 807dfa111baff243b315de695fa7c846b39b5150
Author: Christian Hergert <chergert redhat com>
Date:   Tue Sep 27 12:23:39 2022 -0700

    spellcheck: fix invalidation region when applying checker

 src/editor-text-buffer-spell-adapter.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/src/editor-text-buffer-spell-adapter.c b/src/editor-text-buffer-spell-adapter.c
index bd9210a..9096255 100644
--- a/src/editor-text-buffer-spell-adapter.c
+++ b/src/editor-text-buffer-spell-adapter.c
@@ -657,7 +657,7 @@ editor_text_buffer_spell_adapter_set_checker (EditorTextBufferSpellAdapter *self
 
       if (length > 0)
         {
-          _cjh_text_region_remove (self->region, 0, length - 1);
+          _cjh_text_region_remove (self->region, 0, length);
           _cjh_text_region_insert (self->region, 0, length, RUN_UNCHECKED);
           g_assert_cmpint (length, ==, _cjh_text_region_get_length (self->region));
         }