PhpdocNoEmptyReturnFixer is too greedy

[dmvdbrugge]

The PHP version you are using ($ php -v):

PHP 7.1.18 (cli) (built: May 25 2018 19:18:59) ( NTS )
Copyright (c) 1997-2018 The PHP Group
Zend Engine v3.1.0, Copyright (c) 1998-2018 Zend Technologies
    with Zend OPcache v7.1.18, Copyright (c) 1999-2018, by Zend Technologies

PHP CS Fixer version you are using ($ php-cs-fixer -V):

PHP CS Fixer 2.12.1 Long Journey by Fabien Potencier and Dariusz Ruminski

The command you use to run PHP CS Fixer:

vendor/bin/php-cs-fixer fix -v --using-cache=no

The configuration file you are using, if any:

Basically the same as dmvdbrugge/dynamic-components, except explicit_string_variable, header_comment, no_alternative_syntax, and no_unset_on_property

If applicable, please provide minimum samples of PHP code (as plain text, not screenshots):

• before running PHP CS Fixer (no changes):

/**
 * @return string[]|NULL[].
 */

• after first run:

/**
 * @return NULL[]|string[]
 */

• after second run:

• expected:

/**
 * @return string[]|null[]
 */

Meta: this is case 48 of #3844

[dmvdbrugge]

Picking up this one now.