sanitizer: Allow <wbr> elements by default

<wbr> is a safe element, so let it be.

Author: twm

html5lib/filters/sanitizer.py

@@ -111,6 +111,7 @@
     (namespaces['html'], 'ul'),
     (namespaces['html'], 'var'),
     (namespaces['html'], 'video'),
+    (namespaces['html'], 'wbr'),
     (namespaces['mathml'], 'maction'),
     (namespaces['mathml'], 'math'),
     (namespaces['mathml'], 'merror'),

html5lib/tests/test_sanitizer.py

@@ -59,6 +59,12 @@ def test_data_uri_disallowed_type():
     assert expected == sanitized
 
 
+def test_wbr_allowed():
+    sanitized = sanitize_html('<wbr>')
+    expected = '<wbr>'
+    assert expected == sanitized
+
+
 def test_sanitizer():
     for ns, tag_name in sanitizer.allowed_elements:
         if ns != constants.namespaces["html"]: