[MERGE] versionedfile.py code cleanups

[Robert Collins]

On Thu, 2007-09-20 at 09:42 +1000, Ian Clatworthy wrote:
> @@ -424,7 +426,8 @@
>      def annotate(self, version_id):
>          return list(self.annotate_iter(version_id))
>  
> -    def _apply_delta(self, lines, delta):
> +    @staticmethod
> +    def _apply_delta(lines, delta):
>          """Apply delta to lines."""
>          lines = list(lines)
>          offset = 0 

Whats this for? 

-Rob
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