1: doctype "MainGrammar.g.etl";
     2: 
     3: /// This doc comment should be ignored
     4: let a = 5;
     5: let b = a;
     6: // There is no round brackets in the grammar yet. So blocks are used.
     7: a + b / 2 + {let c = 3; c * {a-b+1;}; };
     8: