reword re int types

Co-authored-by: Antoine Pitrou <[email protected]>

peps/pep-0733.rst

@@ -505,8 +505,8 @@ Usage of ``const`` in the API is currently sparse, but it is not
 clear whether this is something that we should consider changing
 [`Issue 38 <https://github.com/capi-workgroup/problems/issues/38>`__].
 
-We currently use the C types ``long`` and ``int``, where ``stdint``
-and ``int32_t`` would have been better choices
+We currently use the C types ``long`` and ``int``, where fixed-width integers
+such as ``int32_t`` and ``int64_t`` would have been better choices
 [`Issue 27 <https://github.com/capi-workgroup/problems/issues/27>`__].
 
 We are using C language features which are hard for other languages