docs: update copy

Author: kgryte

spec/draft/API_specification/indexing.rst

@@ -198,7 +198,7 @@ An array must support indexing by an indexing tuple which contains only integers
 
 - If ``T`` contains at least one non-zero-dimensional integer array, all elements of ``T`` must be broadcast against each other to determine a common shape ``S2 = (s1, s2, ..., sN)`` according to standard broadcasting rules (see :ref:`broadcasting`). If one or more elements in ``T`` are not broadcast-compatible with the others, an exception must be raised.
 
-- After broadcasting elements of ``T`` to a common shape ``S2``, the resulting tuple ``U = (u1, u2, ..., uN)`` must only contain integer arrays having shape ``S2``.
+- After broadcasting elements of ``T`` to a common shape ``S2``, the resulting tuple ``U = (u1, u2, ..., uN)`` must only contain integer arrays having shape ``S2`` (i.e., ``u1 = broadcast_to(t1, S2)``, ``u2 = broadcast_to(t2, S2)``, et cetera).
 
 - Each element in ``U`` must specify a multi-dimensional index ``v_i = (u1[i], u2[i], ..., uN[i])``, where ``i`` ranges over ``S2``. The result of ``A[U]`` must be constructed by gathering elements from ``A`` at each coordinate tuple ``v_i``. For example, let ``A`` have shape ``(4,4)`` and ``U`` contain integer arrays equivalent to ``([0,1], [2,3])``, with ``u1 = [0,1]`` and ``u2 = [2,3]``. The resulting coordinate tuples must be ``(0,2)`` and ``(1,3)``, respectively, and the resulting array must have shape ``(2,)`` and contain elements ``A[(0,2)]`` and ``A[(1,3)]``.