Fix copy detection corner case
We were aborting if the copied from rev was before the cut-off limit,
rather than the copied _to_ rev. The copied from rev can be
arbitrarily old.
#!/bin/sh
hg init
echo "Is there an error message when trying to diff non-existing files?"
hg diff not found
echo "Is there an error message when trying to add non-existing files?"
hg add not found