In Django 2, routes defines via urls.path are aggresively escaped when converted into regex.
This is a naive fix which unescapes all characters outside capture groups, but in the context of OpenAPI is okay because regular expressions inside paths are not supported anyway.
This issue affects django-rest-framework as well, as outlined in encode/django-rest-framework#5672, encode/django-rest-framework#5675.
Cristi Vîjdea