Fix doc/annotation of enqueue_map_image return value

Closes gh-872

Author: inducer

doc/runtime_memory.rst

@@ -418,8 +418,8 @@ Mapping Memory into Host Address Space
     See :class:`map_flags` for possible values of *flags*.
     *strides*, if given, overrides *order*.
 
-    :return: a tuple *(array, event)*. *array* is a
-        :class:`numpy.ndarray` representing the host side
+    :return: a tuple *(array, event, row_pitch, slice_pitch)*.
+        *array* is a :class:`numpy.ndarray` representing the host side
         of the map. Its *.base* member contains a
         :class:`MemoryMap`.
 

pyopencl/_cl.pyi

@@ -1528,7 +1528,7 @@ def enqueue_map_image(
         strides: tuple[int, ...] | None = None,
         wait_for: WaitList = None,
         is_blocking: bool = True
-    ) -> np.ndarray[tuple[int, ...], DTypeT]: ...
+    ) -> tuple[np.ndarray[tuple[int, ...], DTypeT], Event, int, int]: ...
 
 class SVMPointer:
     @property