Specified encoding in setup.py calls of open()

[ka-bo]

Description

The files of the project are encoded in UTF-8, yet the opening of files in the setup.py does not specify this encoding. When trying to install on a system with a non-UTF-8 locale using pip install pybind11/. the process fails with the the following error:

Processing /pybind11
    Complete output from command python setup.py egg_info:
    Traceback (most recent call last):
      File "<string>", line 1, in <module>
      File "/tmp/pip-mi6rymcm-build/setup.py", line 74, in <module>
        matches = dict(VERSION_REGEX.findall(f.read()))
      File "/usr/lib/python3.6/encodings/ascii.py", line 26, in decode
        return codecs.ascii_decode(input, self.errors)[0]
    UnicodeDecodeError: 'ascii' codec can't decode byte 0xe2 in position 16164: ordinal not in range(128)

Specifying that the files should be opened using UTF-8 encoding fixes the problem.

Suggested changelog entry:

Specified UTF8-encoding in setup.py calls of open()

[Skylion007]

This isn't the right syntax for Python2 @ka-bo

[ka-bo]

Thanks for the hint @henryiii, exactly that exec seemed to be the problem.

The updated version should work now.