enhanced

Arrangement_2/doc_tex/Arrangement_2_ref/arr_insert.tex

@@ -46,14 +46,14 @@ Inserts the given curve \ccc{c} into the arrangement with history
 \ccc{arr}.}
 
 \ccRequirements
-\begin{enumerate}
+\begin{itemize}
 \item The instantiated \ccc{Traits} class must model the
   \ccc{ArrangementTraits_2} concept. That is, it should define the
   \ccc{Curve_2} type, and support its subdivision into $x$-monotone
   subcurves (and perhaps isolated points).
 \item The point-location object \ccc{pl}, must model the
   \ccc{ArrangementPointLocation_2} concept.
-\end{enumerate}
+\end{itemize}
 
 \end{ccRefFunction}