[libwnck] meson, docs: use `ignore_headers` stanza

[Marco Trevisan <marcotrevi src gnome org>]

commit 94a30776f2e535057123688c037a326a2ea07646
Author: Marco Trevisan (Treviño) <mail 3v1n0 net>
Date:   Wed Nov 7 06:23:33 2018 -0500

    meson, docs: use `ignore_headers` stanza

 doc/meson.build | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/doc/meson.build b/doc/meson.build
index cadec0d..e28db18 100644
--- a/doc/meson.build
+++ b/doc/meson.build
@@ -8,9 +8,9 @@ gnome.gtkdoc(meson.project_name(),
     link_with: libwnck_lib
   ),
   gobject_typesfile: meson.project_name() + '.types',
+  ignore_headers: ['wnck-enum-types.h', 'version.h'],
   scan_args: [
     '--rebuild-types',
-    '--ignore-headers=' + ' '.join(['wnck-enum-types.h', 'version.h']),
     '--deprecated-guards="WNCK_DISABLE_DEPRECATED"'
   ],
   install: true,