Description:
------------
Example A:

echo "a";
$A = new A(); //A.php in the application/library,YAF will autoload the class
echo "b";

The output is:
a
b

But Should be:
ab

Example B:
I make a Class like this and put the file in application/library/Controller.php

abstract class Controller extends Yaf_Controller_Abstract{
    .........
}

Then I create a Index.php in application/controllers/index.php
class IndexController extends Controller {
    public function indexAction() {

        echo "a";
    }
}

I call the action index,the output should be "a",but the result is "\na",an extra character "\n" appear before a.