gh-107211: No longer export internal functions (6) (#108424)

No longer export these 5 internal C API functions:

* _PyArena_AddPyObject()
* _PyArena_Free()
* _PyArena_Malloc()
* _PyArena_New()
* _Py_FatalRefcountErrorFunc()

Change comment style to "// comment" and add comment explaining why
other functions have to be exported.

1 files changed, 1 insertions, 0 deletions

diff --git a/Include/internal/pycore_pyerrors.h b/Include/internal/pycore_pyerrors.h
index 91fd6898452..5d2ad50e0d2 100644
--- a/Include/internal/pycore_pyerrors.h
+++ b/Include/internal/pycore_pyerrors.h
@@ -152,6 +152,7 @@ extern int _PyErr_CheckSignalsTstate(PyThreadState *tstate);
 extern void _Py_DumpExtensionModules(int fd, PyInterpreterState *interp);
 extern PyObject* _Py_CalculateSuggestions(PyObject *dir, PyObject *name);
 extern PyObject* _Py_Offer_Suggestions(PyObject* exception);
+
 // Export for '_testinternalcapi' shared extension
 PyAPI_FUNC(Py_ssize_t) _Py_UTF8_Edit_Cost(PyObject *str_a, PyObject *str_b,
                                           Py_ssize_t max_cost);