gh-101100: Fix Py_DEBUG dangling Sphinx references (#115003)

Author: smontanaro

Doc/c-api/intro.rst

@@ -148,7 +148,7 @@ complete listing.
    worse performances (due to increased code size for example). The compiler is
    usually smarter than the developer for the cost/benefit analysis.
 
-   If Python is :ref:`built in debug mode <debug-build>` (if the ``Py_DEBUG``
+   If Python is :ref:`built in debug mode <debug-build>` (if the :c:macro:`Py_DEBUG`
    macro is defined), the :c:macro:`Py_ALWAYS_INLINE` macro does nothing.
 
    It must be specified before the function return type. Usage::
@@ -812,12 +812,14 @@ available that support tracing of reference counts, debugging the memory
 allocator, or low-level profiling of the main interpreter loop.  Only the most
 frequently used builds will be described in the remainder of this section.
 
-Compiling the interpreter with the :c:macro:`Py_DEBUG` macro defined produces
+.. c:macro:: Py_DEBUG
+
+Compiling the interpreter with the :c:macro:`!Py_DEBUG` macro defined produces
 what is generally meant by :ref:`a debug build of Python <debug-build>`.
-:c:macro:`Py_DEBUG` is enabled in the Unix build by adding
+:c:macro:`!Py_DEBUG` is enabled in the Unix build by adding
 :option:`--with-pydebug` to the :file:`./configure` command.
 It is also implied by the presence of the
-not-Python-specific :c:macro:`_DEBUG` macro.  When :c:macro:`Py_DEBUG` is enabled
+not-Python-specific :c:macro:`!_DEBUG` macro.  When :c:macro:`!Py_DEBUG` is enabled
 in the Unix build, compiler optimization is disabled.
 
 In addition to the reference count debugging described below, extra checks are
@@ -832,4 +834,3 @@ after every statement run by the interpreter.)
 
 Please refer to :file:`Misc/SpecialBuilds.txt` in the Python source distribution
 for more detailed information.
-

Doc/library/test.rst

@@ -324,9 +324,9 @@ The :mod:`test.support` module defines the following constants:
 
 .. data:: Py_DEBUG
 
-   True if Python is built with the :c:macro:`Py_DEBUG` macro defined: if
-   Python is :ref:`built in debug mode <debug-build>`
-   (:option:`./configure --with-pydebug <--with-pydebug>`).
+   True if Python was built with the :c:macro:`Py_DEBUG` macro
+   defined, that is, if
+   Python was :ref:`built in debug mode <debug-build>`.
 
    .. versionadded:: 3.12