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/marshal.rst b/Doc/c-api/marshal.rst
index b086830..2f58043 100644
--- a/Doc/c-api/marshal.rst
+++ b/Doc/c-api/marshal.rst
@@ -67,7 +67,7 @@
reading.
On error, sets the appropriate exception (:exc:`EOFError`, :exc:`ValueError`
- or :exc:`TypeError`) and returns *NULL*.
+ or :exc:`TypeError`) and returns ``NULL``.
.. c:function:: PyObject* PyMarshal_ReadLastObjectFromFile(FILE *file)
@@ -81,7 +81,7 @@
anything else from the file.
On error, sets the appropriate exception (:exc:`EOFError`, :exc:`ValueError`
- or :exc:`TypeError`) and returns *NULL*.
+ or :exc:`TypeError`) and returns ``NULL``.
.. c:function:: PyObject* PyMarshal_ReadObjectFromString(const char *data, Py_ssize_t len)
@@ -90,5 +90,5 @@
containing *len* bytes pointed to by *data*.
On error, sets the appropriate exception (:exc:`EOFError`, :exc:`ValueError`
- or :exc:`TypeError`) and returns *NULL*.
+ or :exc:`TypeError`) and returns ``NULL``.