php-parser/test/code/prettyPrinter/commentsInCommaList.test

Comments in arrays and function calls
-----
<?php

$arr = [
    // Foo
    $foo,
    // Bar
    $bar,
    // Discarded
];
[
    // Foo
    $foo,
    ,
    // Bar
    $bar,
] = $arr;
foo(
    // Foo
    $foo,
    // Bar
    $bar
);
new Foo(
    // Foo
    $foo
);
-----
!!php7
$arr = [
    // Foo
    $foo,
    // Bar
    $bar,
];
[
    // Foo
    $foo,
    ,
    // Bar
    $bar,
] = $arr;
foo(
    // Foo
    $foo,
    // Bar
    $bar
);
new Foo(
    // Foo
    $foo
);