LOL helpage.

In your folders that came with v4 you'll find magnets.  I think its props, could be wrong.  Click on the magnet for chest, and then select it in the workspace.  You should be able to pull the magnet out a fraction and the shirt will move out along with it.

In any other instance, if you dont want to do that, select the chest part of the shirt, and go to your dials on the right, and use the scale dials, just a little bit.  Since your chest area isnt completely hanging out of the shirt, a bit of scaling (probably z scale) should just cover them nice nice.