Markup nit: For the Python documents, we use \empt instead of \textit.

Doc/ext/ext.tex

@@ -1883,7 +1883,7 @@ noddy_new_noddy(PyObject* self, PyObject* args)
 This is in fact just a regular module function, as described in the
 last chapter.  The reason it gets special mention is that this is
 where we create our Noddy object.  Defining PyTypeObject structures is
-all very well, but if there's no way to actually \textit{create} one
+all very well, but if there's no way to actually \emph{create} one
 of the wretched things it is not going to do anyone much good.
 
 Almost always, you create objects with a call of the form: