docs: rephrase copy

Author: kgryte

src/array_api_stubs/_draft/manipulation_functions.py

@@ -91,9 +91,7 @@ def expand_dims(x: array, /, axis: Union[int, Tuple[int, ...]]) -> array:
         axis position(s) (zero-based). If ``axis`` is an integer,
 
         -   a valid axis position **must** reside on the closed-interval ``[-N-1, N]``, where ``N`` is the number of dimensions in ``x``.
-        -   if an axis position is specified as a negative integer, the axis position at which to insert a singleton dimension **must** be computed as ``N + axis + 1``.
-        -   if provided ``-1``, the resolved axis position **must** be ``N`` (i.e., a singleton dimension **must** be appended to the input array ``x``).
-        -   if provided ``-N-1``, the resolved axis position **must** be ``0`` (i.e., a singleton dimension **must** be prepended to the input array ``x``).
+        -   if an axis position is specified as a negative integer, the axis position at which to insert a singleton dimension **must** be computed as ``N + axis + 1``. For example, if provided ``-1``, the resolved axis position **must** be ``N`` (i.e., a singleton dimension **must** be appended to the input array ``x``). Similarly, if provided ``-N-1``, the resolved axis position **must** be ``0`` (i.e., a singleton dimension **must** be prepended to the input array ``x``).
         -   if provided an invalid axis position, the function **must** raise an exception.
 
         If ``axis`` is a tuple,