title: Changing elements of list to string
body: <p>I have a list <code>[['user44'],['user204'],['user355'],['user395'],['user452']]</code></p>
  <p>I want to convert it to <code>[ 'user44', 'user204' , 'user355', 'user395', 'user452']</code></p>
  <p>Any help on this?</p>