test: use a different timestamp for the updated file
In the test we want to trigger a write after the underlying dirstate changed. To
do so, we need a write. And as we are about to make dirstate update smarter we
need to meddle with the script a bit to make sure there will be a write.
Differential Revision: https://phab.mercurial-scm.org/D11793
To run the tests, do:
cd tests/
python run-tests.py
See https://mercurial-scm.org/wiki/WritingTests for
more information on writing tests.