compat: back out
a25343d16ebe (initialize LC_CTYPE locale on all Python ...)
As Yuya Nishihara pointed out, setting LC_CTYPE changes the behavior of some
str methods on Python 2.
To run the tests, do:
cd tests/
python run-tests.py
See https://mercurial-scm.org/wiki/WritingTests for
more information on writing tests.