diff --git a/eo/src/EO.h b/eo/src/EO.h
index 85a59c03..626c662c 100644
--- a/eo/src/EO.h
+++ b/eo/src/EO.h
@@ -114,7 +114,7 @@ public:
    * @param _os A ostream.
    */
   virtual void printOn(ostream& _os) const {
-    _os << repFitness << endl;
+    _os << repFitness << ' '; // trailing space to make reading in that much easier
   }
   
   //@}