When the option 'Never' is selected for 'Array Initializer', it is expected that any wrappings between the items are removed on formatting (like it's done for 'Extends/Implements List', for example).

Example:
// before formatting
$data = array(
    1,
    2);

// observed result after formatting
$data = array(
    1,
    2);

// expected result after formatting
$data = array(1, 2);

// or
$data = array(
    1, 2);

To additionally allow the current behavior, a new option 'Preserve Existing' should be added (as it's available for the 'Braces' category).

Sebastian