SF patch #591305 Documentation err in bytecode defs

Doc/lib/libdis.tex

@@ -303,7 +303,7 @@ Implements \code{TOS = TOS1[TOS:]}.
 \end{opcodedesc}
 
 \begin{opcodedesc}{SLICE+2}{}
-Implements \code{TOS = TOS1[:TOS1]}.
+Implements \code{TOS = TOS1[:TOS]}.
 \end{opcodedesc}
 
 \begin{opcodedesc}{SLICE+3}{}