Fix references to n_o = 1

algorithm.tex

@@ -252,7 +252,8 @@ type, but also we had to build the expression that causes the
 divergence in quite an \emph{ad hoc} way which makes divergence even
 more unlikely: setting an $n_o$ twice the depth of the syntax tree of
 the outermost type case should be enough to capture all realistic
-cases.
+cases. For instance, all examples given in Section~\ref{sec:practical}
+can be checked (or found to be ill-typed) with $n_o = 1$.
 \fi