bug? iter_entries() skips from_dir entry

[Aaron Bentley]

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Err...

Aaron Bentley wrote:
| An explicit root also allows you to graft trees together in interesting
| ways.  You can copy the root of A into B as a subdirectory, and still be
| able to

...still be able to merge from B to A and vice-versa, even merges
involving file moves.
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