https://github.com/jaraco/cssutils/blob/v2.3.0/CHANGES.rst (cherry picked from commit ade1f796cb93e804983d956efc3356bdc1cf532f)
https://github.com/jaraco/cssutils/blob/v2.3.0/CHANGES.rst (cherry picked from commit ade1f796cb93e804983d956efc3356bdc1cf532f)