py3: use util.forcebytestr to convert str to bytes Differential Revision: https://phab.mercurial-scm.org/D2498

sshpeer: factor out code for creating peers from pipes An upcoming commit will want to instantiate an SSH peer via an alternate mechanism that doesn't require running a new `ssh` command. To facilitate that, we extract the code for creating a peer from pipes to its own function. Differential Revision: https://phab.mercurial-scm.org/D2391

py3: add b'' prefixes in tests/test-rollback.t This makes the test run succesfully on Python 3. There is just a b'' prefix extra in the output. # skip-blame because we added just b'' prefixes Differential Revision: https://phab.mercurial-scm.org/D2510

py3: add b'' prefix in tests/test-revlog-v2.t After this, the test works on Python 3. There is some extra return value by open().write() I think which needs to be handled. # skip-blame because just b'' prefix Differential Revision: https://phab.mercurial-scm.org/D2509

py3: add b'' prefixes in tests/test-revlog.t # skip-blame because just b'' prefixes Differential Revision: https://phab.mercurial-scm.org/D2508

py3: make sure we open the file in bytes mode This makes the test pass on Python 3. Differential Revision: https://phab.mercurial-scm.org/D2507

py3: add b'' prefixes in tests/test-revlog-ancestry.py # skip-blame because just b'' prefixes Differential Revision: https://phab.mercurial-scm.org/D2506

py3: port the markdirver extension in tests/test-resolve.t Differential Revision: https://phab.mercurial-scm.org/D2505