Update chapters/equations.tex

Co-authored-by: Henrik Tidefelt <henrikt@wolfram.com>

chapters/equations.tex

@@ -303,7 +303,6 @@ \subsubsection{Equations within When-Equations}\label{restrictions-on-equations-
   Any left hand side reference, (\lstinline!v!, \lstinline!out1!, \ldots), in a \lstinline!when!-clause must be a component reference, and any indices must be parameter expressions.
 \end{itemize}
 
-
 \begin{nonnormative}
 The needed restrictions on equations within a \lstinline!when!-equation becomes apparent with the following example:
 \begin{lstlisting}[language=modelica]