'ascii' codec can't decode byte

Hey.

[ sorry, I use online translator ]

When assembling the mat2 version (0.7.0) to debian stretch faced with such a problem (when building in a chroot environment):

dh clean --with python3 --buildsystem=pybuild
   dh_auto_clean -O--buildsystem=pybuild
	pybuild --clean -i python{version} -p 3.5
I: pybuild base:184: python3.5 setup.py clean 
Traceback (most recent call last):
  File "setup.py", line 4, in <module>
    long_description = fh.read()
  File "/usr/lib/python3.5/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 3259: ordinal not in range(128)
E: pybuild pybuild:283: clean: plugin distutils failed with: exit code=1: python3.5 setup.py clean 
dh_auto_clean: pybuild --clean -i python{version} -p 3.5 returned exit code 13
debian/rules:6: recipe for target 'clean' failed
make: *** [clean] Error 25
dpkg-buildpackage: error: debian/rules clean gave error exit status 2

In the README file.md is a bad character. Here (point symbols):

compressed again, … Since some

Decision:

Replace with "normal points".

After that, everything was going fine.