tests: extract wire protocol shell helpers to standalone file This will make it easier for other tests to get up and running without the boilerplate. Differential Revision: https://phab.mercurial-scm.org/D3176

addbranchrevs: no longer accept revset as "revs" (API) The only caller was removed in 0b4692b9646d (bundle: avoid repo.lookup() for converting revnum to nodeid, 2018-04-02). Differential Revision: https://phab.mercurial-scm.org/D3192

clone: avoid using repo.lookup() with binary nodeid The code in hg.clone() is a bit of a mess, but it seems like the "checkout" variable is always a binary nodeid (tests pass when run with "assert len(checkout) == 20" before the repo.lookup()). repo.lookup() will soon work only with string inputs, so we need remove this use. Differential Revision: https://phab.mercurial-scm.org/D3191

merge: avoid unnecessary conversion from binary nodeid to binary nodeid "node" is already a binary nodeid here, so there's no need to convert it. repo.lookup() will soon lose support for binary nodeids as input. Differential Revision: https://phab.mercurial-scm.org/D3190

tests: stabilize test-push-http.t for Windows See 594dd384803c.

tests: add a substitution pattern for HTTP error log dates This will make tests with error log content less of a nuisance. I didn't roll it into to $LOGDATE$ because the regex got long and line wrapped. It didn't seem worth the obscurity.

wireproto: convert python literal to object without using unsafe eval() Follows up cc5a040fe150. At this point, I don't think we need a real eval(). If we want to support a set literal, maybe we can vendor ast.literal_eval(), which is relatively simple function.

tests: quote variable passed to shell test command

py3: system-stringify repr(frame) That's the Py3 requirement.

wireproto: show unknown id and flags in repr(frame) Perhaps we'll want it for debugging.