[gtk+] Document gdk_content_provider_contents_changed

[Matthias Clasen <matthiasc src gnome org>]

commit ddcd687617a54328eac49103723a773d5c624ada
Author: Matthias Clasen <mclasen redhat com>
Date:   Mon Dec 4 16:08:32 2017 -0800

    Document gdk_content_provider_contents_changed

 gdk/gdkcontentprovider.c |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)
---
diff --git a/gdk/gdkcontentprovider.c b/gdk/gdkcontentprovider.c
index 235d195..d15eb49 100644
--- a/gdk/gdkcontentprovider.c
+++ b/gdk/gdkcontentprovider.c
@@ -253,6 +253,12 @@ gdk_content_provider_ref_storable_formats (GdkContentProvider *provider)
   return GDK_CONTENT_PROVIDER_GET_CLASS (provider)->ref_storable_formats (provider);
 }
 
+/**
+ * gdk_content_provider_content_changeD:
+ * @provider: a #GdkContentProvider
+ *
+ * Emits the #GdkContentProvider::contents-changed signal.
+ */
 void
 gdk_content_provider_content_changed (GdkContentProvider *provider)
 {