Remove duplication.
diff --git a/Doc/library/tkinter.ttk.rst b/Doc/library/tkinter.ttk.rst
index 7bf39b3..f70d163 100644
--- a/Doc/library/tkinter.ttk.rst
+++ b/Doc/library/tkinter.ttk.rst
@@ -1240,7 +1240,7 @@
*layoutspec*, if specified, is expected to be a list or some other
sequence type (excluding strings), where each item should be a tuple and
the first item is the layout name and the second item should have the
- format described described in `Layouts`_.
+ format described in `Layouts`_.
To understand the format, see the following example (it is not
intended to do anything useful)::