Incorrect line numbers in non-advanced mode

[lucaswerkmeister]

If you get an error, e. g. with this program

assert (false);

the error message

ceylon.language::AssertionError "Assertion failed: false at main.ceylon (3:7-3:13)"

refers to incorrect line numbers. In the script as shown to the user, the error line is line 1, not line 3.