Correct typo introduced in e81918c as part of modelica#2907 and discu…

…ssed in this PR.

chapters/equations.tex

@@ -725,7 +725,7 @@ \section{Initialization, initial equation, and initial algorithm}\label{initiali
   The equations and assignments in these initial sections are purely algebraic, stating constraints between the variables at the initial time instant.
   It is not allowed to use \lstinline!when!-clauses in these sections.
 \item
-  For a non-discrete-time \lstinline!Real! variable \lstinline!vc!, the equation \lstinline!pre(vc) = vc! is added to the initialization equations.
+  For a continuous-time \lstinline!Real! variable \lstinline!vc!, the equation \lstinline!pre(vc) = vc! is added to the initialization equations.
   \begin{nonnormative}
   If \lstinline!pre(vc)! is not present in the flattened model, a tool may choose not to introduce this equation, or if it was introduced
   it can eliminate it (to avoid the introduction of many dummy variables \lstinline!pre(vc)!).
@@ -739,7 +739,7 @@ \section{Initialization, initial equation, and initial algorithm}\label{initiali
   \item
     For a discrete-time variable \lstinline!vd!, the equation \lstinline!pre(vd) = startExpression! is added to the initialization equations.
   \item
-    For a non-discrete-time \lstinline!Real! variable \lstinline!vc!, the equation \lstinline!vc = startExpression! is added to the initialization equations.
+    For a continuous-time \lstinline!Real! variable \lstinline!vc!, the equation \lstinline!vc = startExpression! is added to the initialization equations.
   \end{itemize}
 \end{enumerate}
 
@@ -765,7 +765,7 @@ \section{Initialization, initial equation, and initial algorithm}\label{initiali
 \begin{nonnormative}
 In the case a parameter has both a binding equation and \lstinline!fixed = false! a diagnostics is recommended, but the parameter should be solved from the binding equation.
 
-Non-discrete-time \lstinline!Real! variables \lstinline!vc! have exactly one initialization value since the rules above assure that during initialization \lstinline!vc = pre(vc) = vc.startExpression! (if \lstinline!fixed = true!).
+Continuous-time \lstinline!Real! variables \lstinline!vc! have exactly one initialization value since the rules above assure that during initialization \lstinline!vc = pre(vc) = vc.startExpression! (if \lstinline!fixed = true!).
 
 Before the start of the integration, it must be guaranteed that for all variables \lstinline!v!, \lstinline!v = pre(v)!.
 If this is not the case for some variables \lstinline!vi!, \lstinline!pre(vi) := vi! must be set and an event iteration at the initial time must follow, so the model is re-evaluated, until this condition is fulfilled.