Formatting fails to work correctly when an fx source file contains a string with code embedded in it. The result is a few blank lines, which do not prevent the compilation of the source file. Below is some JavaFX Script which causes this to occur:

def num1 = 10;
def num2 = 50;

println("Sum of {num1} and {num2} is: {sum(num1, num2)}");

function sum(num1: Integer, num2: Integer)
{
    return num1 + num2;
}