[yelp] Hide the subtitle when it matches the title

[Michael Catanzaro <mcatanzaro src gnome org>]

commit beaede417388c3c1b149579796911bff1f055e6e
Author: Michael Catanzaro <mcatanzaro gnome org>
Date:   Mon Aug 10 12:38:54 2015 +0200

    Hide the subtitle when it matches the title
    
    It doesn't look very good to show the header bar subtitle when it is the
    same as the title, e.g. on Mallard index pages.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=753444

 src/yelp-window.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/yelp-window.c b/src/yelp-window.c
index 45faaf4..a45e47d 100644
--- a/src/yelp-window.c
+++ b/src/yelp-window.c
@@ -1187,7 +1187,7 @@ view_root_title (YelpView    *view,
     else
         gtk_header_bar_set_title (GTK_HEADER_BAR (priv->header), _("Help"));
 
-    if (root_title)
+    if (root_title && strcmp (root_title, page_title))
         gtk_header_bar_set_subtitle (GTK_HEADER_BAR (priv->header), root_title);
     else
         gtk_header_bar_set_subtitle (GTK_HEADER_BAR (priv->header), NULL);