diff -up bleach-3.1.4/bleach/html5lib_shim.py.html5lib-prerel-compat bleach-3.1.4/bleach/html5lib_shim.py

--- bleach-3.1.4/bleach/html5lib_shim.py.html5lib-prerel-compat	2020-04-22 15:11:04.269007528 +0200

+++ bleach-3.1.4/bleach/html5lib_shim.py	2020-04-22 15:12:52.086153050 +0200

@@ -20,7 +20,10 @@ from html5lib.constants import (

     namespaces,

     prefixes,

 )

-from bleach._vendor.html5lib.constants import _ReparseException as ReparseException

+try:

+    from bleach._vendor.html5lib.constants import _ReparseException as ReparseException

+except ImportError:

+    from bleach._vendor.html5lib.constants import ReparseException

 from bleach._vendor.html5lib.filters.base import Filter

 from bleach._vendor.html5lib.filters.sanitizer import allowed_protocols

 from bleach._vendor.html5lib.filters.sanitizer import Filter as SanitizerFilter