fixup! Fix invalid_unicode_re on platforms supporting lone surrogates

Author: gsnedders

html5lib/tests/test_stream.py

@@ -293,7 +293,7 @@ def makefile(self, _mode, _bufsize=None):
 def test_invalid_codepoints(inp, num):
     stream = HTMLUnicodeInputStream(StringIO(inp))
     for _i in range(len(inp)):
-        _c = stream.char()
+        stream.char()
     assert len(stream.errors) == num