tests involving assert_files_equal() fail on MSYS2 build on windows

[JF-soft]

When testing, some text files are generated and are expected to be equal to the ones in the folder tests/files.
When using bincopy-20.1.0.tar.gz package and building for MSYS2 usign a custom PKGBUILD, the files on test/files folder have unix line endings while genereted files contains windows file endings. I solved the problem patching the file test_bincopy.py to modifiy this function:

    def assert_files_equal(self, actual, expected):
        with open(actual, 'rb') as fin:
            actual = fin.read()

        # open(expected, 'wb').write(actual)

        with open(expected, 'rb') as fin:
            expected = fin.read()

to:

    def assert_files_equal(self, actual, expected):
        with open(actual, 'rb') as fin:
            actual = fin.read()

        # JF: handle line endings in windows and mac!
        actual = actual.replace(b"\r\n", b"\n").replace(b"\r", b"\n")
        # open(expected, 'wb').write(actual)

        with open(expected, 'rb') as fin:
            expected = fin.read()

but, it would be nice to update test supporting code to handle mismatch of line endings in actual files with respect to expected files.