Fix typo in docstring
diff --git a/Lib/lib-tk/Tkinter.py b/Lib/lib-tk/Tkinter.py
index 2a5ecd7..badc40a 100644
--- a/Lib/lib-tk/Tkinter.py
+++ b/Lib/lib-tk/Tkinter.py
@@ -1506,7 +1506,7 @@
 
         Under Windows, the DEFAULT parameter can be used to set the icon 
         for the widget and any descendents that don't have an icon set
-        explicitely.  DEFAULT can be the relative path to a .ico file
+        explicitly.  DEFAULT can be the relative path to a .ico file
         (example: root.iconbitmap(default='myicon.ico') ).  See Tk
         documentation for more information."""
         if default: