Date API returns wrong current date example in May

Drupal shows wrong current date examples in May for Date fields, Date formats, etc.

For example, at May 7, 2014 it shows '06/07/2014', or 'Jun 7 2014', etc. I think, that's because of following string in date_example_date() function:

  if (date_format($now, 'M') == date_format($now, 'F')) {
    date_modify($now, '+1 month');
  }

date_format($now, 'M') is equal to 'May', and date_format($now, 'F') is equal to 'May', too. So it adds 1 month to current date.