py3: make keys of keyword arguments strings
keys of keyword arguments on Python 3 has to be string. We are dealing with
bytes in our codebase so the keys are also bytes. Done that using
pycompat.strkwargs().
Also after this patch, `hg version` now runs on Python 3.5. Hurray!
# 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