nodemap: test that concurrent process don't see the pending transaction
We don't want other client to read uncommitted data, until the transaction is
really committed.
Differential Revision: https://phab.mercurial-scm.org/D8190
#require rustfmt test-repo
$ . "$TESTDIR/helpers-testrepo.sh"
$ cd "$TESTDIR"/..
$ RUSTFMT=$(rustup which --toolchain nightly rustfmt)
$ for f in `testrepohg files 'glob:**/*.rs'` ; do
> $RUSTFMT --check --unstable-features --color=never $f
> done