ignore for pypy3

Author: seperman

deepdiff/diff_doc.rst

@@ -488,7 +488,7 @@ ignore_string_case
 
 
 ignore_nan_inequality
-    Whether to ignore float('nan') inequality in Python.
+    Whether to ignore float('nan') inequality in Python. Note that this is a cPython "feature". Some versions of Pypy3 for example have nan==nan.
 
     >>> float('nan') == float('nan')
     False

tests/test_diff_text.py

@@ -7,6 +7,7 @@
 from decimal import Decimal
 from deepdiff import DeepDiff
 from deepdiff.helper import number_to_string
+from deepdiff.helper import pypy3
 from tests import CustomClass
 
 logging.disable(logging.CRITICAL)
@@ -1729,5 +1730,6 @@ def test_bool_vs_number(self):
         (float('nan'), float('nan'), {'ignore_nan_inequality': True}, []),
         ([1, float('nan')], [1, float('nan')], {'ignore_nan_inequality': True}, []),
     ])
+    @pytest.mark.skipif(pypy3, reason="some versions of pypy3 have nan==nan")
     def test_ignore_nan_inequality(self, t1, t2, params, expected_result):
         assert expected_result == list(DeepDiff(t1, t2, **params).keys())