typing: add a couple of assertions to lrucachedict to help pytype Fixes the following warnings: line 1488, in pop: No attribute 'markempty' on None [attribute-error] In Optional[Union[Any, _lrucachenode, nothing]] line 1578, in popoldest: No attribute 'markempty' on None [attribute-error] In Optional[Union[Any, _lrucachenode, nothing]] Differential Revision: https://phab.mercurial-scm.org/D7674

[fix]
clang-format:command = clang-format --style file -i
clang-format:pattern = (**.c or **.cc or **.h) and not "listfile:contrib/clang-format-ignorelist"

rustfmt:command = rustfmt
rustfmt:pattern = set:**.rs

black:command = black --config=black.toml -
black:pattern = set:**.py - mercurial/thirdparty/** - "contrib/python-zstandard/**"