[gtksourceview] completion: add bug URL in the code

[Sébastien Wilmet <swilmet src gnome org>]

commit 438348bebd96694a04eaaaab8bf4cf938c3701ac
Author: Sébastien Wilmet <swilmet gnome org>
Date:   Fri Oct 2 18:46:47 2015 +0200

    completion: add bug URL in the code
    
    So it has more chances to be seen. If the code is moved to another
    file, for example, the git blame won't work.

 gtksourceview/gtksourcecompletion.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/gtksourceview/gtksourcecompletion.c b/gtksourceview/gtksourcecompletion.c
index 3f574b6..9699336 100644
--- a/gtksourceview/gtksourcecompletion.c
+++ b/gtksourceview/gtksourcecompletion.c
@@ -1585,6 +1585,7 @@ style_context_changed (GtkStyleContext     *style_context,
         * even if the the value is set to normal. That matter is complicated
         * because PangoAttrFontDesc and PangoAttrWeight will both have the
         * same starting offset in the PangoLayout.
+        * https://bugzilla.gnome.org/show_bug.cgi?id=755968
         */
        if (PANGO_WEIGHT_NORMAL == pango_font_description_get_weight (font_desc))
        {