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Vincent Legoll authored
duplicated between VC plugins that cache repository status informations. There are slight behaviour changes: bzr, monotone & git used to have a get_tree() which always called lookup_tree() if it was not already cached, but without caching at that time either. I think this was wrong and only cut'n'pasted between plugins. But would like to hear from the creators of those plugins. The remaining of the patch is mostly renaming and passing an additional "directory" argument to _lookup_tree_cache() as was required for bzr, but which remains unused for other plugins.
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