Apply suggestions from code review

Co-authored-by: Victor Stinner <vstinner@python.org>

Author: zklaus

Doc/library/sys.rst

@@ -26,7 +26,7 @@ always available. Unless explicitly noted otherwise, all variables are read-only
    enabling an unsupported one) by core dev consensus.  Entries should be removed
    following :pep:`387`.
 
-   The following attributes are available in cpython:
+   The following attributes are available in CPython:
 
    *pointer_bits* is the width of pointers in bits, as an integer, equivalent
    to ``8 * sizeof(void *)``, i.e. usually ``32`` or ``64``.

Python/sysmodule.c

@@ -3699,7 +3699,7 @@ make_abi_info(void)
     return ns;
 
 error:
-    Py_CLEAR(abi_info);
+    Py_DECREF(abi_info);
     return NULL;
 }