Adopt PEP 484 type hints for C++ types exported to Python
diff --git a/example/issues.ref b/example/issues.ref
index 90d8ce1..acb1ed0 100644
--- a/example/issues.ref
+++ b/example/issues.ref
@@ -6,7 +6,7 @@
[3, 5, 7, 9, 11, 13, 15]
0==0, 1==1, 2==2, 3==3, 4==4, 5==5, 6==6, 7==7, 8==8, 9==9,
Failed as expected: Incompatible function arguments. The following argument types are supported:
- 1. (arg0: example.issues.ElementA) -> NoneType
+ 1. (arg0: example.issues.ElementA) -> None
Invoked with: None
Failed as expected: Incompatible function arguments. The following argument types are supported:
1. (arg0: int) -> int