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/float.rst b/Doc/c-api/float.rst
index 057ff52..bfc28a7 100644
--- a/Doc/c-api/float.rst
+++ b/Doc/c-api/float.rst
@@ -34,12 +34,12 @@
.. c:function:: PyObject* PyFloat_FromString(PyObject *str)
Create a :c:type:`PyFloatObject` object based on the string value in *str*, or
- *NULL* on failure.
+ ``NULL`` on failure.
.. c:function:: PyObject* PyFloat_FromDouble(double v)
- Create a :c:type:`PyFloatObject` object from *v*, or *NULL* on failure.
+ Create a :c:type:`PyFloatObject` object from *v*, or ``NULL`` on failure.
.. c:function:: double PyFloat_AsDouble(PyObject *pyfloat)