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: