[gnome-klotski/meson] Meson: fix installing help

[Bilal Elmoussaoui <bilelmoussaoui src gnome org>]

commit 32fe032779331946f445256c6ef58ca5ad9b8552
Author: Bilal Elmoussaoui <bil elmoussaoui gmail com>
Date:   Mon Jan 21 00:29:44 2019 +0000

    Meson: fix installing help

 help/meson.build | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/help/meson.build b/help/meson.build
index 255736b..5a4ebbb 100644
--- a/help/meson.build
+++ b/help/meson.build
@@ -1,4 +1,4 @@
-gnome.yelp ('meson.project_name()',
+gnome.yelp (meson.project_name(),
             sources: [ 'index.docbook',
                        'legal.xml'],
             media: [ 'figures/gnotski_start-window.png',