Closes #2271

Moved Clock to "other predefined" types section.

chapters/classes.tex

@@ -1695,9 +1695,7 @@ \subsubsection{Unspecified enumeration}\doublelabel{unspecified-enumeration}
 to any enumeration type. There can be no enumeration variables declared
 using enumeration(:) in a simulation model.
 
-\subsection{Clock Types}\doublelabel{clock-types}
 
-See \autoref{clocks-and-clocked-variables} and \autoref{clock-constructors}.
 
 \subsection{Attributes start, fixed, nominal, and unbounded}\doublelabel{attributes-start-fixed-nominal-and-unbounded}
 
@@ -1776,3 +1774,7 @@ \subsubsection{Graphical Annotation Types}\doublelabel{graphical-annotation-type
 graphical annotations are described in \autoref{annotations}. These types are not
 predefined in the usual sense since they cannot be referenced in
 ordinary Modelica code, only within annotations.
+
+\subsubsection{Clock Types}\doublelabel{clock-types}
+
+See \autoref{clocks-and-clocked-variables} and \autoref{clock-constructors}.