[gtksourceview] Doc: mention ::show-completion in the completion summary

[SÃbastien Wilmet <swilmet src gnome org>]

commit ec07c32e7595ced7f05a7c699ab9a365a63aca10
Author: SÃbastien Wilmet <swilmet gnome org>
Date:   Sun Feb 10 17:52:02 2013 +0100

    Doc: mention ::show-completion in the completion summary

 gtksourceview/gtksourcecompletion.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/gtksourceview/gtksourcecompletion.c b/gtksourceview/gtksourcecompletion.c
index fa83aa6..defab89 100644
--- a/gtksourceview/gtksourcecompletion.c
+++ b/gtksourceview/gtksourcecompletion.c
@@ -66,7 +66,8 @@
  *
  * Each #GtkSourceView object is associated with a #GtkSourceCompletion
  * instance. This instance can be obtained with
- * gtk_source_view_get_completion().
+ * gtk_source_view_get_completion(). The #GtkSourceView class contains also the
+ * #GtkSourceView::show-completion signal.
  *
  * A same #GtkSourceCompletionProvider object can be used for several
  * #GtkSourceCompletion.