fixup! Fix invalid_unicode_re on platforms supporting lone surrogates

Author: gsnedders

html5lib/tests/test_stream.py

@@ -313,7 +313,11 @@ def test_invalid_codepoints(inp, num):
                                              reason="narrow Python")])
 def test_invalid_codepoints_surrogates(inp, num):
     inp = eval(inp)  # pylint:disable=eval-used
-    stream = HTMLUnicodeInputStream(StringIO(inp))
+    fp = StringIO(inp)
+    if ord(max(fp.read())) > 0xFFFF:
+        pytest.skip("StringIO altered string")
+    fp.seek(0)
+    stream = HTMLUnicodeInputStream(fp)
     for _i in range(len(inp)):
         stream.char()
     assert len(stream.errors) == num