Pass all parameters to GtkTextBuffer.get_text()

With PyGTK the include_hidden_chars parameter to GtkTextBuffer.get_text() had
a default value [1]. With GTK3+pygi the value must be explicitly passed [2].

[1] http://developer.gnome.org/pygtk/stable/class-gtktextbuffer.html#method-gtktextbuffer--get-text
[2] http://developer.gnome.org/gtk3/3.0/GtkTextBuffer.html#gtk-text-buffer-get-text

[changed description]
Signed-off-by: Sascha Silbe <silbe@activitycentral.com>

src/sugar3/activity/namingalert.py

@@ -291,12 +291,12 @@ class NamingAlert(gtk.Window):
 
         text_buffer = self._tags.get_buffer()
         start, end = text_buffer.get_bounds()
-        new_tags = text_buffer.get_text(start, end)
+        new_tags = text_buffer.get_text(start, end, False)
         self._activity.metadata['tags'] = new_tags
 
         text_buffer = self._description.get_buffer()
         start, end = text_buffer.get_bounds()
-        new_description = text_buffer.get_text(start, end)
+        new_description = text_buffer.get_text(start, end, False)
         self._activity.metadata['description'] = new_description
 
         self._activity.metadata['title_set_by_user'] = '1'