Fix sniff which requires each line of multi-line arrays to end in commas

[westonruter]

It doesn't work so well if you have comments or function calls appearing in the array.

<?php
$foo = array(
    'bar' => array_merge(
        array(
            'x' => 1,
        ),
        array(
            'y' => 2,
        )
    ),
    'baz' => function () {
        echo 'Jello World';
    },
);

--------------------------------------------------------------------------------
FOUND 2 ERROR(S) AFFECTING 2 LINE(S)
--------------------------------------------------------------------------------
  3 | ERROR | Each line in an array declaration must end in a comma
 11 | ERROR | Each line in an array declaration must end in a comma
--------------------------------------------------------------------------------

[Rarst]

There is suggested code fix for parenthesis in #9 which should take care of function calls.

Code example for comments?

[westonruter]

@Rarst I've updated the issue description with an example of the problematic code. So the sniff should also be updated to ignore when a line ends in an opening bracket.

[westonruter]

Fixed in #59