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Replace the uses of sha1_to_hex in the pack bitmap code with hash_to_hex to allow the use of SHA-256 as well. Rename a few variables since they are no longer limited to SHA-1. Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
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