Fix comment

src/compiler/emitter.ts

@@ -1047,7 +1047,8 @@ module ts {
                     // Emit identifier as an identifier
                     emit(node.name);
                     write(": ");
-                    // Even though this is stored as identified because it is in short-hand property assignment, treated it as expression 
+                    // Even though this is stored as identified because it is in short-hand property assignment,
+                    // treated it as expression 
                     emitExpressionIdentifier(node.name);
                     emitTrailingComments(node);
                 }

src/compiler/parser.ts

@@ -2687,6 +2687,7 @@ module ts {
                 (<PropertyDeclaration>node).initializer = makeFunctionExpression(SyntaxKind.FunctionExpression, node.pos, undefined, sig, body);
                 return finishNode(node);
             }
+            // Disallow optional property assignment
             if (token === SyntaxKind.QuestionToken) {
                 var questionStart = scanner.getTokenPos();
                 grammarErrorAtPos(questionStart, scanner.getStartPos() - questionStart, Diagnostics.A_object_member_cannot_be_declared_optional);