bpo-38600: Change the mark up of NULL in the C API documentation. (GH-16950)
Replace all *NULL* with ``NULL``.
diff --git a/Doc/c-api/slice.rst b/Doc/c-api/slice.rst
index d924308..48a58c6 100644
--- a/Doc/c-api/slice.rst
+++ b/Doc/c-api/slice.rst
@@ -14,15 +14,15 @@
.. c:function:: int PySlice_Check(PyObject *ob)
- Return true if *ob* is a slice object; *ob* must not be *NULL*.
+ Return true if *ob* is a slice object; *ob* must not be ``NULL``.
.. c:function:: PyObject* PySlice_New(PyObject *start, PyObject *stop, PyObject *step)
Return a new slice object with the given values. The *start*, *stop*, and
*step* parameters are used as the values of the slice object attributes of
- the same names. Any of the values may be *NULL*, in which case the
- ``None`` will be used for the corresponding attribute. Return *NULL* if
+ the same names. Any of the values may be ``NULL``, in which case the
+ ``None`` will be used for the corresponding attribute. Return ``NULL`` if
the new object could not be allocated.