[MERGE] versionedfile.py code cleanups

[Aaron Bentley]

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Ian Clatworthy wrote:
> More minor improvements.

I'm sorry, but these improvements are too radical to be included. ;-)

Aaron

> # Bazaar merge directive format 2 (Bazaar 0.90)
> # revision_id: pqm at pqm.ubuntu.com-20070918045733-es6jch43pxvogvhj
> # target_branch: http://people.ubuntu.com/~ianc/bzr/ianc-integration
> # testament_sha1: 3d43c8bf55e63e457de6d00334f8b6308dfa69e0
> # timestamp: 2007-09-19 18:56:26 +1000
> # base_revision_id: pqm at pqm.ubuntu.com-20070918045733-es6jch43pxvogvhj
> # 
> # Begin patch
> # Begin bundle
> IyBCYXphYXIgcmV2aXNpb24gYnVuZGxlIHY0CiMKQlpoOTFBWSZTWYUFw0YAABHfgAAQQGFzUBIA
> AACv794QIABkRR6nqaep6gZPUA9IxCjJqaBo09JpgjIMQ3m0vN/kfmJsLk0MHQ1W4qiRcX7dBKNJ
> lorThQidj3YxTykvD4J5hd1FQti/6hzQ9gCghgPfGQ8nyFtaDiAA5JCZ68iW34u5IpwoSEKC4aMA

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