Combine bottom parameter with height to simplify use

src/PIL/PSDraw.py

@@ -86,16 +86,11 @@ def rectangle(self, box):
         """
         Draws a rectangle.
 
-        :param box: A 4-tuple of integers whose order and function is currently
-                    undocumented.
-
-                    Hint: the tuple is passed into this format string:
-
-                    .. code-block:: python
-
-                        %d %d M 0 %d %d Vr\n
+        :param box: A tuple of four integers, specifying left, bottom, width and
+           height.
         """
-        self.fp.write(b"%d %d M 0 %d %d Vr\n" % box)
+        left, bottom, width, height = box
+        self.fp.write(b"%d %d M 0 %d %d Vr\n" % (left, bottom + height, width, height))
 
     def text(self, xy, text):
         """