Fix theoretical issue in filecommit. If the file was copied, we don't want to reuse the original entry. I think this is mostly a theoretical issue - when there are copies, fp1 == nullid, so it's very unlikely that the fl.cmp(fp1, t) would think the file was unmodified. In any case, if there was a copy, we should forcefully create a new entry.

     1

% files

     2

dangling -> nothing

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% tar

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dangling -> nothing

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% zip

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dangling -> nothing