Drupal standard reports error on negative numbers in square brackets

Checking my code with Drupal standard I found code sniffer report errors on lines where I have an

• array defined with bracket syntax and
• the first value is a negative number.

Here my example code:

/**
 * @file
 * MY PROJECT include.
 */

/**
 * Get icon settings.
 */
function my_project_icon_settins() {
  return [
    'bracket-p-p' => [15, 10],
    'array-p-p' => array(19, 14),
    'bracket-n-p' => [-15, 0],
    'array-n-p' => array(-19, 1),
    'bracket-p-n' => [15, -10],
    'array-p-n' => array(19, -23),
    'bracket-n-n' => [-15, -10],
    'array-n-n' => array(-19, -23),
  ];
}

Result:

FILE: ..MY_MODULE/inc.inc
----------------------------------------------------------------------
FOUND 4 ERRORS AFFECTING 2 LINES
----------------------------------------------------------------------
 14 | ERROR | [x] Expected 1 space before "-"; 0 found
 14 | ERROR | [x] Expected 1 space after "-"; 0 found
 18 | ERROR | [x] Expected 1 space before "-"; 0 found
 18 | ERROR | [x] Expected 1 space after "-"; 0 found
----------------------------------------------------------------------
PHPCBF CAN FIX THE 4 MARKED SNIFF VIOLATIONS AUTOMATICALLY
----------------------------------------------------------------------