Clarify that ternary use of array range isn't a problem for associati…

…vity

chapters/operatorsandexpressions.tex

@@ -33,6 +33,7 @@ \section{Operator Precedence and Associativity}\label{operator-precedence-and-as
 A precedence group may also be non-associative, meaning that there is no implicit subexpression structure defined based on associativity.
 For example, non-associativity of relational operators means that \lstinline!1 < 2 < 3! is an invalid expression.
 Note that the operators don't need to be identical for associativity to matter; also \lstinline!1 == 2 < 3! is invalid, and \lstinline!1 - 2 + 3! is implicitly structured as \lstinline!(1 - 2) + 3!.
+Also note that the non-associative array range in Modelica can be used with either two or three operands separated by `\lstinline!:!', meaning that \lstinline!1 : 2 : 5! is one valid ternary use of the operator rather than two invalid binary uses of the operator.
 
 \begin{nonnormative}
 Associativity of a precedence group is a property of the Modelica operator symbols, and is not the same concept as mathematical operator associativity.