merge: make a copy of dict.items() before mutating the dict during iteration Differential Revision: https://phab.mercurial-scm.org/D2344

largefiles: give some **opts some strkwargs love Differential Revision: https://phab.mercurial-scm.org/D2343

wireproto: fix lingering str(exception) with util.forcebytestr(exception) Differential Revision: https://phab.mercurial-scm.org/D2342

scmutil: fix requires-file isalnum() check on first byte Slice instead of subscript to get a bytes from a bytes. # skip-blame just a py3 slice-instead-of-subscript change Differential Revision: https://phab.mercurial-scm.org/D2341

largefiles: mark headre as bytes regex Differential Revision: https://phab.mercurial-scm.org/D2340

largfiles: replace filter() with listcomp when result needs to be a list filter() is a generator on Python 3, but these cases are used as lists. Differential Revision: https://phab.mercurial-scm.org/D2339

largefiles: make scheme regex a bytes regex # skip-blame just a b prefix Differential Revision: https://phab.mercurial-scm.org/D2338

debuginstall: do not parse editor command in posix way on Windows An editor command is executed by a system shell, which is cmd.exe on Windows.

py3: use bytes() to byte-stringify url object in url.py Perhaps we'll have to convert it back and forth from/to bytes and unicode at urllib boundary, but at least util.hidepassword() wants a byte string.

url: show full url of proxy server in debug message This only fixes the debug message spotted by issue5796.