docs: small fixes for profiling.nested and the overall description - profiling.nested defaults to 0, not 5 - profiling is not always done with lsprof Differential Revision: https://phab.mercurial-scm.org/D2641

scmutil: fix oversight in b76248e51605c6 where I forgot to use msg Thanks to Yuya for spotting my mistake. Differential Revision: https://phab.mercurial-scm.org/D2636

hghave: remove unused "as ex" in exception block I overlooked this when removing a debug print in another change. Differential Revision: https://phab.mercurial-scm.org/D2637

tests: port test-log to Python 3 Required some porting to >>> inline Python instead of using heredocs into $PYTHON. Differential Revision: https://phab.mercurial-scm.org/D2621

py3: make gettext domain a system string

templater: fix position of terminator character in error message Since a template expression starts after the '{' character, the expression should be considered to end immediately before the terminator '{'.

merge with stable

test-subrepo: glob away an unstable hash This is the instability mentioned at the beginning of the series. I don't like hiding it, but I don't want to sit on a fix for a user reported problem while trying to figure this out. The instability seems related to the cset with a .hgsub with a remote URL. (There's very little existing remote URL subrepo testing.)

subrepo: activate clone pooling to enable sharing with remote URLs This is the easiest way to ensure that repositories with remote subrepo references can share the subrepos, consistent with how local subrepos can be shared.

subrepo: don't attempt to share remote sources (issue5793) Untangling _abssource() to resolve the new subrepo relative to the shared parent's share path, and then either sharing from there (if it exists), or cloning to that location and then sharing, is probably more than should be attempted on stable. Absolute subrepo references are discouraged, so for now, this resumes the behavior prior to 68e0bcb90357 of cloning the absolute subrepo locally.