bpo-38600: Change the mark up of NULL in the C API documentation. (GH-16950)

Replace all *NULL* with ``NULL``.

1 files changed, 37 insertions, 37 deletions

diff --git a/Doc/c-api/number.rst b/Doc/c-api/number.rst
index 74932f6..55ddb9c 100644
--- a/Doc/c-api/number.rst
+++ b/Doc/c-api/number.rst
@@ -17,25 +17,25 @@ Number Protocol
 
 .. c:function:: PyObject* PyNumber_Add(PyObject *o1, PyObject *o2)
 
-   Returns the result of adding *o1* and *o2*, or *NULL* on failure.  This is the
+   Returns the result of adding *o1* and *o2*, or ``NULL`` on failure.  This is the
    equivalent of the Python expression ``o1 + o2``.
 
 
 .. c:function:: PyObject* PyNumber_Subtract(PyObject *o1, PyObject *o2)
 
-   Returns the result of subtracting *o2* from *o1*, or *NULL* on failure.  This is
+   Returns the result of subtracting *o2* from *o1*, or ``NULL`` on failure.  This is
    the equivalent of the Python expression ``o1 - o2``.
 
 
 .. c:function:: PyObject* PyNumber_Multiply(PyObject *o1, PyObject *o2)
 
-   Returns the result of multiplying *o1* and *o2*, or *NULL* on failure.  This is
+   Returns the result of multiplying *o1* and *o2*, or ``NULL`` on failure.  This is
    the equivalent of the Python expression ``o1 * o2``.
 
 
 .. c:function:: PyObject* PyNumber_MatrixMultiply(PyObject *o1, PyObject *o2)
 
-   Returns the result of matrix multiplication on *o1* and *o2*, or *NULL* on
+   Returns the result of matrix multiplication on *o1* and *o2*, or ``NULL`` on
    failure.  This is the equivalent of the Python expression ``o1 @ o2``.
 
    .. versionadded:: 3.5
@@ -43,14 +43,14 @@ Number Protocol
 
 .. c:function:: PyObject* PyNumber_FloorDivide(PyObject *o1, PyObject *o2)
 
-   Return the floor of *o1* divided by *o2*, or *NULL* on failure.  This is
+   Return the floor of *o1* divided by *o2*, or ``NULL`` on failure.  This is
    equivalent to the "classic" division of integers.
 
 
 .. c:function:: PyObject* PyNumber_TrueDivide(PyObject *o1, PyObject *o2)
 
    Return a reasonable approximation for the mathematical value of *o1* divided by
-   *o2*, or *NULL* on failure.  The return value is "approximate" because binary
+   *o2*, or ``NULL`` on failure.  The return value is "approximate" because binary
    floating point numbers are approximate; it is not possible to represent all real
    numbers in base two.  This function can return a floating point value when
    passed two integers.
@@ -58,7 +58,7 @@ Number Protocol
 
 .. c:function:: PyObject* PyNumber_Remainder(PyObject *o1, PyObject *o2)
 
-   Returns the remainder of dividing *o1* by *o2*, or *NULL* on failure.  This is
+   Returns the remainder of dividing *o1* by *o2*, or ``NULL`` on failure.  This is
    the equivalent of the Python expression ``o1 % o2``.
 
 
@@ -66,7 +66,7 @@ Number Protocol
 
    .. index:: builtin: divmod
 
-   See the built-in function :func:`divmod`. Returns *NULL* on failure.  This is
+   See the built-in function :func:`divmod`. Returns ``NULL`` on failure.  This is
    the equivalent of the Python expression ``divmod(o1, o2)``.
 
 
@@ -74,21 +74,21 @@ Number Protocol
 
    .. index:: builtin: pow
 
-   See the built-in function :func:`pow`. Returns *NULL* on failure.  This is the
+   See the built-in function :func:`pow`. Returns ``NULL`` on failure.  This is the
    equivalent of the Python expression ``pow(o1, o2, o3)``, where *o3* is optional.
-   If *o3* is to be ignored, pass :c:data:`Py_None` in its place (passing *NULL* for
+   If *o3* is to be ignored, pass :c:data:`Py_None` in its place (passing ``NULL`` for
    *o3* would cause an illegal memory access).
 
 
 .. c:function:: PyObject* PyNumber_Negative(PyObject *o)
 
-   Returns the negation of *o* on success, or *NULL* on failure. This is the
+   Returns the negation of *o* on success, or ``NULL`` on failure. This is the
    equivalent of the Python expression ``-o``.
 
 
 .. c:function:: PyObject* PyNumber_Positive(PyObject *o)
 
-   Returns *o* on success, or *NULL* on failure.  This is the equivalent of the
+   Returns *o* on success, or ``NULL`` on failure.  This is the equivalent of the
    Python expression ``+o``.
 
 
@@ -96,70 +96,70 @@ Number Protocol
 
    .. index:: builtin: abs
 
-   Returns the absolute value of *o*, or *NULL* on failure.  This is the equivalent
+   Returns the absolute value of *o*, or ``NULL`` on failure.  This is the equivalent
    of the Python expression ``abs(o)``.
 
 
 .. c:function:: PyObject* PyNumber_Invert(PyObject *o)
 
-   Returns the bitwise negation of *o* on success, or *NULL* on failure.  This is
+   Returns the bitwise negation of *o* on success, or ``NULL`` on failure.  This is
    the equivalent of the Python expression ``~o``.
 
 
 .. c:function:: PyObject* PyNumber_Lshift(PyObject *o1, PyObject *o2)
 
-   Returns the result of left shifting *o1* by *o2* on success, or *NULL* on
+   Returns the result of left shifting *o1* by *o2* on success, or ``NULL`` on
    failure.  This is the equivalent of the Python expression ``o1 << o2``.
 
 
 .. c:function:: PyObject* PyNumber_Rshift(PyObject *o1, PyObject *o2)
 
-   Returns the result of right shifting *o1* by *o2* on success, or *NULL* on
+   Returns the result of right shifting *o1* by *o2* on success, or ``NULL`` on
    failure.  This is the equivalent of the Python expression ``o1 >> o2``.
 
 
 .. c:function:: PyObject* PyNumber_And(PyObject *o1, PyObject *o2)
 
-   Returns the "bitwise and" of *o1* and *o2* on success and *NULL* on failure.
+   Returns the "bitwise and" of *o1* and *o2* on success and ``NULL`` on failure.
    This is the equivalent of the Python expression ``o1 & o2``.
 
 
 .. c:function:: PyObject* PyNumber_Xor(PyObject *o1, PyObject *o2)
 
-   Returns the "bitwise exclusive or" of *o1* by *o2* on success, or *NULL* on
+   Returns the "bitwise exclusive or" of *o1* by *o2* on success, or ``NULL`` on
    failure.  This is the equivalent of the Python expression ``o1 ^ o2``.
 
 
 .. c:function:: PyObject* PyNumber_Or(PyObject *o1, PyObject *o2)
 
-   Returns the "bitwise or" of *o1* and *o2* on success, or *NULL* on failure.
+   Returns the "bitwise or" of *o1* and *o2* on success, or ``NULL`` on failure.
    This is the equivalent of the Python expression ``o1 | o2``.
 
 
 .. c:function:: PyObject* PyNumber_InPlaceAdd(PyObject *o1, PyObject *o2)
 
-   Returns the result of adding *o1* and *o2*, or *NULL* on failure.  The operation
+   Returns the result of adding *o1* and *o2*, or ``NULL`` on failure.  The operation
    is done *in-place* when *o1* supports it.  This is the equivalent of the Python
    statement ``o1 += o2``.
 
 
 .. c:function:: PyObject* PyNumber_InPlaceSubtract(PyObject *o1, PyObject *o2)
 
-   Returns the result of subtracting *o2* from *o1*, or *NULL* on failure.  The
+   Returns the result of subtracting *o2* from *o1*, or ``NULL`` on failure.  The
    operation is done *in-place* when *o1* supports it.  This is the equivalent of
    the Python statement ``o1 -= o2``.
 
 
 .. c:function:: PyObject* PyNumber_InPlaceMultiply(PyObject *o1, PyObject *o2)
 
-   Returns the result of multiplying *o1* and *o2*, or *NULL* on failure.  The
+   Returns the result of multiplying *o1* and *o2*, or ``NULL`` on failure.  The
    operation is done *in-place* when *o1* supports it.  This is the equivalent of
    the Python statement ``o1 *= o2``.
 
 
 .. c:function:: PyObject* PyNumber_InPlaceMatrixMultiply(PyObject *o1, PyObject *o2)
 
-   Returns the result of matrix multiplication on *o1* and *o2*, or *NULL* on
+   Returns the result of matrix multiplication on *o1* and *o2*, or ``NULL`` on
    failure.  The operation is done *in-place* when *o1* supports it.  This is
    the equivalent of the Python statement ``o1 @= o2``.
 
@@ -168,7 +168,7 @@ Number Protocol
 
 .. c:function:: PyObject* PyNumber_InPlaceFloorDivide(PyObject *o1, PyObject *o2)
 
-   Returns the mathematical floor of dividing *o1* by *o2*, or *NULL* on failure.
+   Returns the mathematical floor of dividing *o1* by *o2*, or ``NULL`` on failure.
    The operation is done *in-place* when *o1* supports it.  This is the equivalent
    of the Python statement ``o1 //= o2``.
 
@@ -176,7 +176,7 @@ Number Protocol
 .. c:function:: PyObject* PyNumber_InPlaceTrueDivide(PyObject *o1, PyObject *o2)
 
    Return a reasonable approximation for the mathematical value of *o1* divided by
-   *o2*, or *NULL* on failure.  The return value is "approximate" because binary
+   *o2*, or ``NULL`` on failure.  The return value is "approximate" because binary
    floating point numbers are approximate; it is not possible to represent all real
    numbers in base two.  This function can return a floating point value when
    passed two integers.  The operation is done *in-place* when *o1* supports it.
@@ -184,7 +184,7 @@ Number Protocol
 
 .. c:function:: PyObject* PyNumber_InPlaceRemainder(PyObject *o1, PyObject *o2)
 
-   Returns the remainder of dividing *o1* by *o2*, or *NULL* on failure.  The
+   Returns the remainder of dividing *o1* by *o2*, or ``NULL`` on failure.  The
    operation is done *in-place* when *o1* supports it.  This is the equivalent of
    the Python statement ``o1 %= o2``.
 
@@ -193,44 +193,44 @@ Number Protocol
 
    .. index:: builtin: pow
 
-   See the built-in function :func:`pow`. Returns *NULL* on failure.  The operation
+   See the built-in function :func:`pow`. Returns ``NULL`` on failure.  The operation
    is done *in-place* when *o1* supports it.  This is the equivalent of the Python
    statement ``o1 **= o2`` when o3 is :c:data:`Py_None`, or an in-place variant of
    ``pow(o1, o2, o3)`` otherwise. If *o3* is to be ignored, pass :c:data:`Py_None`
-   in its place (passing *NULL* for *o3* would cause an illegal memory access).
+   in its place (passing ``NULL`` for *o3* would cause an illegal memory access).
 
 
 .. c:function:: PyObject* PyNumber_InPlaceLshift(PyObject *o1, PyObject *o2)
 
-   Returns the result of left shifting *o1* by *o2* on success, or *NULL* on
+   Returns the result of left shifting *o1* by *o2* on success, or ``NULL`` on
    failure.  The operation is done *in-place* when *o1* supports it.  This is the
    equivalent of the Python statement ``o1 <<= o2``.
 
 
 .. c:function:: PyObject* PyNumber_InPlaceRshift(PyObject *o1, PyObject *o2)
 
-   Returns the result of right shifting *o1* by *o2* on success, or *NULL* on
+   Returns the result of right shifting *o1* by *o2* on success, or ``NULL`` on
    failure.  The operation is done *in-place* when *o1* supports it.  This is the
    equivalent of the Python statement ``o1 >>= o2``.
 
 
 .. c:function:: PyObject* PyNumber_InPlaceAnd(PyObject *o1, PyObject *o2)
 
-   Returns the "bitwise and" of *o1* and *o2* on success and *NULL* on failure. The
+   Returns the "bitwise and" of *o1* and *o2* on success and ``NULL`` on failure. The
    operation is done *in-place* when *o1* supports it.  This is the equivalent of
    the Python statement ``o1 &= o2``.
 
 
 .. c:function:: PyObject* PyNumber_InPlaceXor(PyObject *o1, PyObject *o2)
 
-   Returns the "bitwise exclusive or" of *o1* by *o2* on success, or *NULL* on
+   Returns the "bitwise exclusive or" of *o1* by *o2* on success, or ``NULL`` on
    failure.  The operation is done *in-place* when *o1* supports it.  This is the
    equivalent of the Python statement ``o1 ^= o2``.
 
 
 .. c:function:: PyObject* PyNumber_InPlaceOr(PyObject *o1, PyObject *o2)
 
-   Returns the "bitwise or" of *o1* and *o2* on success, or *NULL* on failure.  The
+   Returns the "bitwise or" of *o1* and *o2* on success, or ``NULL`` on failure.  The
    operation is done *in-place* when *o1* supports it.  This is the equivalent of
    the Python statement ``o1 |= o2``.
 
@@ -239,7 +239,7 @@ Number Protocol
 
    .. index:: builtin: int
 
-   Returns the *o* converted to an integer object on success, or *NULL* on
+   Returns the *o* converted to an integer object on success, or ``NULL`` on
    failure.  This is the equivalent of the Python expression ``int(o)``.
 
 
@@ -247,13 +247,13 @@ Number Protocol
 
    .. index:: builtin: float
 
-   Returns the *o* converted to a float object on success, or *NULL* on failure.
+   Returns the *o* converted to a float object on success, or ``NULL`` on failure.
    This is the equivalent of the Python expression ``float(o)``.
 
 
 .. c:function:: PyObject* PyNumber_Index(PyObject *o)
 
-   Returns the *o* converted to a Python int on success or *NULL* with a
+   Returns the *o* converted to a Python int on success or ``NULL`` with a
    :exc:`TypeError` exception raised on failure.
 
 
@@ -274,7 +274,7 @@ Number Protocol
    If *o* can be converted to a Python int but the attempt to
    convert to a Py_ssize_t value would raise an :exc:`OverflowError`, then the
    *exc* argument is the type of exception that will be raised (usually
-   :exc:`IndexError` or :exc:`OverflowError`).  If *exc* is *NULL*, then the
+   :exc:`IndexError` or :exc:`OverflowError`).  If *exc* is ``NULL``, then the
    exception is cleared and the value is clipped to *PY_SSIZE_T_MIN* for a negative
    integer or *PY_SSIZE_T_MAX* for a positive integer.