Building the wiki is recommended when working on the doc

wiki/src/contribute/how/documentation.mdwn

@@ -39,9 +39,9 @@ Documentation writers coordinate themselves using our usual
 Documentation writers should also read our [[documentation
 guidelines|guidelines]].
 
-If you want to test your contributions before to sharing them with us,
-you can [[build and update the documentation
-offline|contribute/build/website]].
+We recommend you to [[build an offline version of the
+documentation|contribute/build/website]] to test your contributions
+before sharing them with us.
 
 # Translating