Mandate that Axis.unit is used for axis tick labels

chapters/annotations.tex

@@ -160,17 +160,16 @@ \subsubsection{Axis Properties}\label{axis-properties}
 Properties may be defined for each \lstinline!Plot! axis:
 \begin{lstlisting}[language=modelica]
 record Axis
-  Real min "Axis lower bound";
-  Real max "Axis upper bound";
-  String unit "Unit of min and max";
+  Real min "Axis lower bound, in 'unit'";
+  Real max "Axis upper bound, in 'unit'";
+  String unit "Unit of axis tick labels";
   String label "Axis label";
 end Axis;
 \end{lstlisting}
 
 When an axis bound isn't provided, the tool computes one automatically.
 
-The Modelica tool is responsible for showing the unit used for values at the
-axis tick marks, so the axis \lstinline!label! shall not contain the unit.
+The Modelica tool is responsible for showing that values at the axis tick marks are expressed in \lstinline!unit!, so the axis \lstinline!label! shall not contain this information.
 
 If a tool does not recognize the \lstinline!unit!, it is recommended to issue a
 warning and treat the \lstinline!unit! as if it was not specified.