[doc] fix typos in a few manuals

doc/developer/developer.tex

@@ -107,7 +107,9 @@ This is the documentation of the \framac
 implementation\footnote{\url{http://frama-c.com}} which aims at
 helping developers integrate new plug-ins inside this platform.
 
-The content of this document corresponds to the version \framacversion,released on \today,of \framac. However the development of \framac is still ongoing: features
+The content of this document corresponds to the version \framacversion,
+released on \today, of \framac.
+However the development of \framac is still ongoing: features
 described here may still evolve in the future.
 
 \section*{Acknowledgements}

doc/userman/userman.tex

@@ -44,7 +44,7 @@
 \addcontentsline{toc}{chapter}{Foreword}
 
 This is the user manual of \FramaC\footnote{\url{http://frama-c.com}}.  The
-content of this document corresponds to the version \framacversion, on \today, of
+content of this document corresponds to the version \framacversion, released on \today, of
 \FramaC.
 
 \section*{Acknowledgements}

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

@@ -35,7 +35,7 @@
 \addcontentsline{toc}{chapter}{Foreword}
 
 This is the user manual of the WP plug-in of \FramaC\footnote{\url{http://frama-c.com}}.
-The content of this document corresponds to the version \FCVERSION, on \today, of
+The content of this document corresponds to the version \FCVERSION, released on \today, of
 \FramaC.
 
 \section*{Acknowledgements}