tests: make simple single quotes work with dummyssh on windows Mercurial assumes that the shell on remote servers over ssh servers uses unix quoting rules. Tests using dummyssh are however also run on windows where cmd doesn't parse single quotes like on unix. This hack replaces the single quotes with double quotes on windows - that is enough to make test-ssh.t pass after d8fa35c28335.

tests: ensure platform independent revision hashes in test-notify.t Makes the test pass again on windows after ca572e94d8e7.