rebuild for 10.11+

lib/python3.7/site-packages/lxml/html/diff.py

@@ -1,3 +1,7 @@
+# cython: language_level=3
+
+from __future__ import absolute_import
+
 import difflib
 from lxml import etree
 from lxml.html import fragment_fromstring
@@ -621,7 +625,7 @@ def fixup_chunks(chunks):
                     % (cur_word, result, chunk, chunks))
                 cur_word.post_tags.append(chunk)
         else:
-            assert(0)
+            assert False
 
     if not result:
         return [token('', pre_tags=tag_accum)]
@@ -799,7 +803,6 @@ def _move_el_inside_block(el, tag):
         if _contains_block_level_tag(child):
             break
     else:
-        import sys
         # No block-level tags in any child
         children_tag = etree.Element(tag)
         children_tag.text = el.text