Test py::iterable/py::iterator representation in docstrings

tests/test_pytypes.cpp

@@ -13,6 +13,10 @@
 TEST_SUBMODULE(pytypes, m) {
     // test_int
     m.def("get_int", []{return py::int_(0);});
+    // test_iterator
+    m.def("get_iterator", []{return py::iterator();});
+    // test_iterable
+    m.def("get_iterable", []{return py::iterable();});
     // test_list
     m.def("get_list", []() {
         py::list list;

tests/test_pytypes.py

@@ -5,9 +5,19 @@ import sys
 from pybind11_tests import pytypes as m
 from pybind11_tests import debug_enabled
 
+
 def test_int(doc):
     assert doc(m.get_int) == "get_int() -> int"
 
+
+def test_iterator(doc):
+    assert doc(m.get_iterator) == "get_iterator() -> Iterator"
+
+
+def test_iterable(doc):
+    assert doc(m.get_iterable) == "get_iterable() -> Iterable"
+
+
 def test_list(capture, doc):
     with capture:
         lst = m.get_list()