[gedit] docs: ignore gedit-pango.h

[Sébastien Wilmet <swilmet src gnome org>]

commit 381c1abf69e1855b0a66e051a9e7f81124606da5
Author: Sébastien Wilmet <swilmet gnome org>
Date:   Tue Nov 19 07:28:10 2019 +0100

    docs: ignore gedit-pango.h
    
    There was this gtk-doc warning:
    ./gedit-unused.txt:1: warning: 1 unused declarations.

 docs/reference/meson.build | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/docs/reference/meson.build b/docs/reference/meson.build
index e4c3ea6f6..5155d2cfc 100644
--- a/docs/reference/meson.build
+++ b/docs/reference/meson.build
@@ -52,6 +52,7 @@ libgedit_reference_ignored_h = [
   'gedit-open-document-selector-store.h',
   'gedit-open-document-selector.h',
   'gedit-open-menu-button.h',
+  'gedit-pango.h',
   'gedit-plugins-engine.h',
   'gedit-preferences-dialog.h',
   'gedit-print-job.h',