tests: drop py2 support from test-doctest.py

tests: drop py2 support from test-demandimport.py

tests: optional PEP 657 error location in test-extension.t (issue6781)

tests: filter out PEP 657 error locations in tracebacks (issue6780) https://docs.python.org/3/whatsnew/3.11.html#whatsnew311-pep657

pytype: add coverage for parts of hgext There are tons of things to fix here (which have been blacklisted for now), but this should help prevent further regressions.

convert: stop passing str to the dateutil API in darcs I'm sure there's a bunch more stuff in here that's broken, but this was flagged by pytype.

typing: suppress a couple of attribute-errors in convert I thought these might be real issues, but they're not.

hooklib: force an exception wrapped by errors.Abort to bytestr Flagged by PyCharm and pytype.

notify: force an exception wrapped by errors.Abort to bytestr Flagged by PyCharm and pytype.

typing: disable a bogus attribute-error warning in phabricator In a local pytype run, this fixes: File "/mnt/c/Users/Matt/hg/hgext/phabricator.py", line 359, in <lambda>: No attribute 'items' on bytes [attribute-error] In Union[Any, bytes] Called from (traceback): line 363, in process The `bytes` case takes the previous `if` branch though.

sparse: fix a py2 based usage of `map()` In a local pytype run, this fixes: File "/mnt/c/Users/Matt/hg/hgext/sparse.py", line 386, in debugsparse: unsupported operand type(s) for item retrieval: 'fcounts: Iterator[int]' and '0: int' [unsupported-operands] No attribute '__getitem__' on 'fcounts: Iterator[int]' File "/mnt/c/Users/Matt/hg/hgext/sparse.py", line 387, in debugsparse: unsupported operand type(s) for item retrieval: 'fcounts: Iterator[int]' and '1: int' [unsupported-operands] No attribute '__getitem__' on 'fcounts: Iterator[int]' File "/mnt/c/Users/Matt/hg/hgext/sparse.py", line 388, in debugsparse: unsupported operand type(s) for item retrieval: 'fcounts: Iterator[int]' and '2: int' [unsupported-operands] No attribute '__getitem__' on 'fcounts: Iterator[int]'

typing: adjust `mercurial.util.iterlines()` to accept any `Iterable` In a local pytype run on the extensions, this fixes: File "/mnt/c/Users/Matt/hg/hgext/phabricator.py", line 788, in maketext: Function mercurial.util.iterlines was called with the wrong arguments [wrong-arg-types] Expected: (iterator: Iterator[bytes]) Actually passed: (iterator: list) Attributes of protocol Iterator[bytes] are not implemented on list: __next__

typing: disable an attribute-error warning in the journal extension The code is complicated enough that pytype doesn't realize that `name` can't be `None` if it is evaluated here.

remotefilelog: byteify the message for a few StorageErrors Flagged by pytype locally.

histedit: byteify the help for the multifold action While there's some allowance for str in `_()`, it's commented to be for "goofy unicode docstrings in test", so no idea how well that works, but it should at least come back as bytes. With HGPLAIN, however, the str isn't touched and is returned as-is, so this seems like a real bug.

typing: disable a few incorrect warnings in pywatchman The module-attr warnings are for things that only exist on Windows, and the wrong-keyword-args warning is due to a special case for a specific constructor. Both of these are properly conditionalized.

watchman: refactor transport connecting to unconfuse pytype Pytype sees `self.proc` as potentially `None` here, even though it's set by the `_connect()` logic. Instead of asserting, simply use the process returned by that method (which it sets into `self.proc` before returning, so there's no functional change here).

watchman: refactor `ctypes.windll.kernel32` references to a local variable This is flagged by pytype as an attribute-error, and it's easier to disable that in a single place.

typing: disable [unsupported-operands] warning in the largefiles outgoing hook For some reason, pytype thinks `toupload` is a set: No attribute '__setitem__' on Set[nothing] (It actually is a set in the subsequent `else` branch, but I'm not interested in trying to rewrite this to be consistent.)

typing: add some assertions that a variable isn't None In the case of blackbox, there's a default limit if one isn't explicitly supplied. For the monotone regex, neither group is optional, so a match means it's not None.

largefiles: reference `mercurial.configitems.dynamicdefault` directly Pytype was unable to see `dynamicdefault` on `eh.configitem`. This is clearer anyway.

releasenotes: fix a typo in a comment

schemes: fix a broken check for drive letter conflicts Flagged by pytype locally. It appears to have regressed in 1863584f2fba (not yet released). This seems like an obvious typo- `dict.isalpha()` is nonsense. There's no crash though because `schemes` is pre-populated with 5 schemes (that are all now defunct), so the length of the dict is never 1, so it's impossible to abort.

typing: suppress a bunch of potential import-error cases in extensions As flagged by pytype locally. Either the ImportError is locally handled, or the imported module was previously determined to be present by `hgave` (for the phabricator extension), or is handled by the `hgext.convert.subversion` module when imported (for the `hgext.convert.transport` module).