[f-spot] Fix some obsolete code AppendText -> InsertText

[Stephen Shaw <sshaw src gnome org>]

commit 8f3f37cad748d3dbbfcfef56c4b631bb7cedf351
Author: Stephen Shaw <sshaw decriptor com>
Date:   Sat Nov 19 22:03:23 2011 -0700

    Fix some obsolete code AppendText -> InsertText

 src/Clients/MainApp/FSpot.Widgets/TagEntry.cs |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/Clients/MainApp/FSpot.Widgets/TagEntry.cs b/src/Clients/MainApp/FSpot.Widgets/TagEntry.cs
index c2551a3..bcf5062 100644
--- a/src/Clients/MainApp/FSpot.Widgets/TagEntry.cs
+++ b/src/Clients/MainApp/FSpot.Widgets/TagEntry.cs
@@ -122,7 +122,7 @@ namespace FSpot.Widgets {
 		private void AppendComma ()
 		{
 			if (Text.Length != 0 && !Text.Trim ().EndsWith (","))
-				AppendText (", ");
+				InsertText (", ");
 		}
 
 		public string [] GetTypedTagNames ()