[libgdata] documents: Fix some documentation for thumbnail downloads

[Philip Withnall <pwithnall src gnome org>]

commit d2c038fe3f9a098ec8ee6eb4edb03d114e2daf64
Author: Philip Withnall <philip tecnocode co uk>
Date:   Sat Jul 28 12:20:32 2012 +0200

    documents: Fix some documentation for thumbnail downloads

 .../services/documents/gdata-documents-document.c  |    7 ++-----
 1 files changed, 2 insertions(+), 5 deletions(-)
---
diff --git a/gdata/services/documents/gdata-documents-document.c b/gdata/services/documents/gdata-documents-document.c
index 4810955..b4b4a69 100644
--- a/gdata/services/documents/gdata-documents-document.c
+++ b/gdata/services/documents/gdata-documents-document.c
@@ -335,18 +335,15 @@ gdata_documents_document_get_download_uri (GDataDocumentsDocument *self, const g
 }
 
 /**
- * gdata_documents_document_download_thumbnail:
+ * gdata_documents_document_get_thumbnail_uri:
  * @self: a #GDataDocumentsDocument
- * @service: the #GDataDocumentsService
- * @cancellable: (allow-none): a #GCancellable for the entire download stream, or %NULL
- * @error: a #GError, or %NULL
  *
  * Gets the URI of the thumbnail for the #GDataDocumentsDocument. If no thumbnail exists for the document, %NULL will be returned.
  *
  * The thumbnail may then be downloaded using a #GDataDownloadStream.
  *
  * <example>
- *	<title></title>
+ *	<title>Downloading a Document Thumbnail</title>
  *	<programlisting>
  *	GDataDocumentsService *service;
  *	const gchar *thumbnail_uri;