diff --git a/doc/mainpage.dox b/doc/mainpage.dox
--- a/doc/mainpage.dox
+++ b/doc/mainpage.dox
@@ -50,11 +50,12 @@
 
 If you
 want to see how LEMON works, see
-some \ref demoprograms "demo programs"!
+some \ref demoprograms "demo programs".
 
 If you know what you are looking for then try to find it under the
 <a class="el" href="modules.html">Modules</a>
 section.
 
-If you are a user of the old (0.x) series of LEMON, please check out the \ref migration "Migration Guide" for the backward incompatibilities.
+If you are a user of the old (0.x) series of LEMON, please check out the
+\ref migration "Migration Guide" for the backward incompatibilities.
 */