diff -r fd69e2f2cb72 Lib/turtle.py
--- a/Lib/turtle.py	Mon Mar 14 18:58:41 2011 +0200
+++ b/Lib/turtle.py	Mon Mar 14 23:23:14 2011 +0100
@@ -3352,7 +3352,7 @@
     def dot(self, size=None, *color):
         """Draw a dot with diameter size, using color.
 
-        Optional argumentS:
+        Optional arguments:
         size -- an integer >= 1 (if given)
         color -- a colorstring or a numeric color tuple