Fix broken links.

doc/api.tex

@@ -189,8 +189,8 @@ constructed.
 
 Here is the way we build the formula $2+2=4$. The main difficulty is to
 access the internal identifier for addition: it must be retrieved from
-the standard theory \texttt{Int} of the file \texttt{int.why} (see
-Chap~\ref{sec:library}).
+the standard theory \texttt{Int} of the file \texttt{int.why}.
+% (see Chap~\ref{sec:library}).
 \lstinputlisting{generated/logic__buildfmla.ml}
 An important point to notice as that when building the application of
 $+$ to the arguments, it is checked that the types are correct. Indeed

doc/exec.tex

@@ -118,8 +118,14 @@ extraction command line:
 
 \paragraph{Examples.}
 We illustrate different ways of using the \texttt{extract} command through some
-examples. Consider the program in Figure~\ref{fig:AQueue} on
-page~\pageref{fig:AQueue}. If we are only interested in extracting function
+examples.
+\begin{latexonly}
+Consider the program in Figure~\ref{fig:AQueue} on page~\pageref{fig:AQueue}.
+\end{latexonly}
+\begin{htmlonly}
+Consider the program of Section~\ref{sec:AQueue}.
+\end{htmlonly}
+If we are only interested in extracting function
 \texttt{enqueue}, we can proceed as follows:
 \begin{verbatim}
 > why3 extract -D ocaml64 -L . aqueue.AmortizedQueue.enqueue -o aqueue.ml

doc/whyml.tex

@@ -931,6 +931,7 @@ end
 %END LATEX
 
 \section{Problem 5: Amortized Queue}
+\label{sec:AQueue}
 
 The last problem consists in verifying the implementation of a
 well-known purely applicative data structure for queues.