Better repr for failing ipow special case test

Author: honno

Diff for: .github/workflows/numpy.yml

@@ -45,6 +45,8 @@ jobs:
         array_api_tests/test_set_functions.py
         # https://github.com/numpy/numpy/issues/21211
         array_api_tests/test_special_cases.py::test_iop[__iadd__(x1_i is -0 and x2_i is -0) -> -0]
+        # https://github.com/numpy/numpy/issues/21213
+        array_api_tests/test_special_cases.py::test_iop[__ipow__(x1_i is -0 and x2_i > 0 and not (x2_i.is_integer() and x2_i % 2 == 1)) -> +0]
         # noted diversions from spec
         array_api_tests/test_special_cases.py::test_binary[floor_divide(x1_i is +infinity and isfinite(x2_i) and x2_i > 0) -> +infinity]
         array_api_tests/test_special_cases.py::test_binary[floor_divide(x1_i is +infinity and isfinite(x2_i) and x2_i < 0) -> -infinity]

Diff for: array_api_tests/test_special_cases.py

@@ -437,7 +437,8 @@ def parse_cond(cond_str: str) -> Tuple[UnaryCheck, str, BoundFromDtype]:
     elif cond_str == "an odd integer value":
         cond = lambda i: i.is_integer() and i % 2 == 1
         expr_template = "{}.is_integer() and {} % 2 == 1"
-        from_dtype = integers_from_dtype  # type: ignore
+        if not_cond:
+            expr_template = f"({expr_template})"
 
         def from_dtype(dtype: DataType, **kw) -> st.SearchStrategy[float]:
             return integers_from_dtype(dtype, **kw).filter(lambda n: n % 2 == 1)