SF 810242. Fix doubled word errors.
diff --git a/Doc/ref/ref3.tex b/Doc/ref/ref3.tex
index 2ab1a01..e235963 100644
--- a/Doc/ref/ref3.tex
+++ b/Doc/ref/ref3.tex
@@ -1656,7 +1656,7 @@
The following optional methods can be defined to further emulate sequence
objects. Immutable sequences methods should at most only define
\method{__getslice__()}; mutable sequences might define all three
-three methods.
+methods.
\begin{methoddesc}[sequence object]{__getslice__}{self, i, j}
\deprecated{2.0}{Support slice objects as parameters to the