[gparted] Launch help from GParted using the new GNOME 3 help: prefix (!24)

[Curtis Gedak <gedakc src gnome org>]

commit 5aca85e4ad040bcc1410fde958e826312ff8e125
Author: Mike Fleetwood <mike fleetwood googlemail com>
Date:   Sun Feb 24 12:22:48 2019 +0000

    Launch help from GParted using the new GNOME 3 help: prefix (!24)
    
    Update GParted to specify the GParted Manual using the new GNOME 3 way
    with the 'help:' prefix to avoid yelp reporting this error:
        Document Not Found
        The URI 'ghelp:gparted' does not point to a valid page.
    
    Closes !24 - Port to GNOME 3 yelp-tools documentation infrastructure

 src/Win_GParted.cc | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)
---
diff --git a/src/Win_GParted.cc b/src/Win_GParted.cc
index 77fc85af..7ebbeec0 100644
--- a/src/Win_GParted.cc
+++ b/src/Win_GParted.cc
@@ -1777,10 +1777,9 @@ void Win_GParted::show_help_dialog( const Glib::ustring & filename /* E.g., gpar
        GError *error = NULL ;
        GdkScreen *gscreen = NULL ;
 
-       Glib::ustring uri = "ghelp:" + filename ;
-       if (link_id .size() > 0 ) {
-               uri = uri + "?" + link_id ;
-       }
+       Glib::ustring uri = "help:" + filename;
+       if (link_id.size() > 0)
+               uri = uri + "/" + link_id;
 
        gscreen = get_window()->get_screen()->gobj();
        gtk_show_uri( gscreen, uri .c_str(), gtk_get_current_event_time(), &error ) ;