Fix a minor typo in the turtle docs. Found by Brandon Passmore on docs@.
diff --git a/Doc/library/turtle.rst b/Doc/library/turtle.rst
index f04a07a..01da6a0 100644
--- a/Doc/library/turtle.rst
+++ b/Doc/library/turtle.rst
@@ -1859,7 +1859,7 @@
:param startx: if positive, starting position in pixels from the left
edge of the screen, if negative from the right edge, if None,
center window horizontally
- :param startx: if positive, starting position in pixels from the top
+ :param starty: if positive, starting position in pixels from the top
edge of the screen, if negative from the bottom edge, if None,
center window vertically