[gnome-font-viewer] Make the features list separator localizable

[Cosimo Cecchi <cosimoc src gnome org>]

commit 4c9a3338195f304721649ddeb2e2ca34323add85
Author: Khaled Hosny <khaledhosny eglug org>
Date:   Tue Sep 26 13:28:31 2017 +0200

    Make the features list separator localizable
    
    Some languages (e.g. Arabic) need to use a different character.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=788182

 src/font-view.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/src/font-view.c b/src/font-view.c
index 919cae8..98e5ae0 100644
--- a/src/font-view.c
+++ b/src/font-view.c
@@ -301,7 +301,8 @@ get_features (FT_Face face)
                 for (k = 0; k < G_N_ELEMENTS (open_type_layout_features); k++) {
                     if (open_type_layout_features[k].tag == features[j]) {
                         if (s->len > 0)
-                            g_string_append (s, ", ");
+                            /* Translators, this seperates the list of Layout Features. */
+                            g_string_append (s, C_("OpenType layout", ", "));
                         g_string_append (s, g_dpgettext2 (NULL, "OpenType layout", 
open_type_layout_features[k].name));
                         break;
                     }