Remove multiple empty lines when formatting PHP code

Formatting options for PHP code offer al lot of different places where blank lines can be placed.

It would be useful if formatting could remove repeated blank lines from code and leave only one line.

For example this code 

function foo() {
    echo "Start\n";


    echo "End\n";
}

will be formatted this way

function foo() {
    echo "Start\n";

    echo "End\n";
}