title: .yml file and Symfony2/Doctrine2 - Escaping special char in password
body: <p>I have a MySQL password with special chars "%" and "$". How can I use it with Symfony2/Doctrine2 and .yml files?</p>
  
  <p>I try:
  "pa%s$s"
  'pa%s$s'
  pa%s$s
  and it didn't work.</p>