remove yaml --- end of doc

Modules/LemmaCore/src/Grid.cpp

 namespace Lemma {
 
     std::ostream &operator << (std::ostream &stream, const Grid &ob) {
-        stream << ob.Serialize()  << "\n---\n"; // End of doc --- as a direct stream should encapulste thingy
+        stream << ob.Serialize()  << "\n";
         return stream;
     }