[WP/Doc] Minor fixes

src/plugins/wp/doc/manual/wp_intro.tex

@@ -55,11 +55,11 @@ The \textsf{WP} plug-in is distributed with the \textsf{Frama-C}
 platform. However, it also requires the \textsf{Why-3} platform and
 you should install at least one external prover in
 order to fulfill proof obligations. An easy choice is to install the
-\textsf{Alt-Ergo} theorem prover developed at
-\textsc{inria}\footnote{\textsf{Alt-Ergo}:
+\textsf{Alt-Ergo} theorem prover originally developed at
+\textsc{inria} and now by \textsc{OcamlPro}\footnote{\textsf{Alt-Ergo}:
   \url{https://alt-ergo.ocamlpro.com/}}. When using the \textsf{Opam} package
   manager, these tools are automatically installed with \textsf{Frama-C}.
-See section~\ref{wp-install-provers} for installing other provers.
+See the documentation of \textsf{Why-3} to install other provers.
 
 
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