Description:
------------
With an array that contains an array, the var_export adds an extra space at end of line

=> It forces post treatment to suppress those extra spaces, before saving output to a file

As spaces at end of line is not a recommended practice...

Test script:
---------------
<?php
  $test = array('string' =>array('foo'));
  var_export($test);
?>


Expected result:
----------------
array (
  'string' =>// <= the line should end with '=>', and not with a space e.g '=> '
  array (
    0 => 'foo',
  ),
)

Actual result:
--------------
array (
  'string' => // <= there's a space after the '=>' symbol
  array (
    0 => 'foo',
  ),
)