"Clever" move fails if counterpart file is already in the destination location

[dantleech]

 rename(/
home/daniel/www/inviqa/lautsprecher-teufel/tests/Unit/Yves/ZipCodeValidator/ZipCodeValidatorTest.php,/home/daniel/www/inviqa
/lautsprecher-teufel/tests/Unit/Service/CheckoutAddressValidator/Model/ZipCodeValidatorTest.php): No such file or directory 
in /home/daniel/www/phpactor/phpactor/vendor/phpactor/source-code-filesystem/lib/Adapter/Simple/SimpleFilesystem.php on line
 49^@Warning: rename(/home/daniel/www/inviqa/lautsprecher-teufel/tests/Unit/Yves/ZipCodeValidator/ZipCodeValidatorTest.php,/
home/daniel/www/inviqa/lautsprecher-teufel/tests/Unit/Service/CheckoutAddressValidator/Model/ZipCodeValidatorTest.php): No s
uch file or directory in /home/daniel/www/phpactor/phpactor/vendor/phpactor/source-code-filesystem/lib/Adapter/Simple/Simple
Filesystem.php on line 49