improve hash docs

Author: picnixz

Doc/c-api/hash.rst

@@ -56,6 +56,8 @@ See also the :c:member:`PyTypeObject.tp_hash` member and :ref:`numeric-hash`.
    it is easier to create colliding strings. A cutoff of 7 on 64-bit platforms
    and 5 on 32-bit platforms should provide a decent safety margin.
 
+   This corresponds to the :data:`sys.hash_info.cutoff` constant.
+
    .. versionadded:: 3.4
 
 
@@ -71,7 +73,6 @@ See also the :c:member:`PyTypeObject.tp_hash` member and :ref:`numeric-hash`.
 .. c:macro:: PyHASH_BITS
 
    The exponent ``n`` of ``P`` in :c:macro:`PyHASH_MODULUS`.
-   This corresponds to the :data:`sys.hash_info.hash_bits` constant.
 
    .. versionadded:: 3.13
 
@@ -111,14 +112,20 @@ See also the :c:member:`PyTypeObject.tp_hash` member and :ref:`numeric-hash`.
 
       Hash function name (UTF-8 encoded string).
 
+      This corresponds to the :data:`sys.hash_info.algorithm` constant.
+
    .. c:member:: const int hash_bits
 
       Internal size of the hash value in bits.
 
+      This corresponds to the :data:`sys.hash_info.hash_bits` constant.
+
    .. c:member:: const int seed_bits
 
       Size of seed input in bits.
 
+      This corresponds to the :data:`sys.hash_info.seed_bits` constant.
+
    .. versionadded:: 3.4