codemod: use pycompat.isdarwin
This is done by:
sed -i "s/pycompat\.sysplatform == 'darwin'/pycompat.isdarwin/" **/*.py
Plus a manual change to `sslutil.py` which involves indentation change that
cannot be done by `sed`.
Differential Revision: https://phab.mercurial-scm.org/D1035
# See http://EditorConfig.org for the specification
root = true
[*.py]
indent_size = 4
indent_style = space
trim_trailing_whitespace = true
[*.{c,h}]
indent_size = 8
indent_style = tab
trim_trailing_whitespace = true