phpcbf deletes return type declaration of function

[Flimm]

I have a file, hello.php, with the following contents:

<?php

function hi(): array
{
    return [];
}

If I run phpcs against it, I got notified that it is violating WordPress.WhiteSpace.ControlStructureSpacing.OpenBraceNotSameLine:

$ vendor/bin/phpcs -s hello.php
FILE: hello.php
-------------------------------------------------------------------------------------------------------------------------------------------------
FOUND 1 ERROR AFFECTING 1 LINE
-------------------------------------------------------------------------------------------------------------------------------------------------
 3 | ERROR | [x] Opening brace should be on the same line as the declaration (WordPress.WhiteSpace.ControlStructureSpacing.OpenBraceNotSameLine)
-------------------------------------------------------------------------------------------------------------------------------------------------
PHPCBF CAN FIX THE 1 MARKED SNIFF VIOLATIONS AUTOMATICALLY
-------------------------------------------------------------------------------------------------------------------------------------------------

So far so good. If I run phpcbf, it corrects it badly:

$ vendor/bin/phpcbf hello.php

PHPCBF RESULT SUMMARY
----------------------------------------------------------------------
FILE                                                  FIXED  REMAINING
----------------------------------------------------------------------
hello.php                                             1      0
----------------------------------------------------------------------
A TOTAL OF 1 ERROR WERE FIXED IN 1 FILE
----------------------------------------------------------------------

The result is:

<?php

function hi() {
    return [];
}

As you can see, phpcbf has corrected the issue with the opening curly brace, but it has deleted the declared return type of the function hi. It should still have : array before the opening curly brace.

Here are my version numbers:

• PHPCS: 3.1.0
• WPCS: 0.13.1
• PHP: 7.1.8

[jrfnl]

Related to #1101