zsh_completion: update various arguments, descriptions, metavariables Addition of "=" means the flag must have an argument after it. Differential Revision: https://phab.mercurial-scm.org/D4518

setup: don't support py 3.5.0, 3.5.1, 3.5.2 because of bug in codecs codecs.escape_encode() raises SystemError if an empty bytestring is passed. We do that at some places in our code and because of this bug, things break. Therefore we can't support the mentioned version. The bug was fixed in 3.5.3, 3.6.0 beta 2. We can't support 3.6.0 anyway because of bug in formatting bytestrings. Link to the python bug: https://bugs.python.org/issue25270 Differential Revision: https://phab.mercurial-scm.org/D4475

util: update lrucachedict order during get() get() should have the same semantics as __getitem__ for item retrieval. Differential Revision: https://phab.mercurial-scm.org/D4506