ugly comments in `offsetlookup`

Prettier 1.14.3

PHP Plugin 0.9.0

# Options (if any):
--single-quote

Input:

$var = $var
    // Comment
    ['foo'] // Comment
    // Comment
    ['bar'] // Comment
    // Comment
    ['baz'] // Comment
    // Comment
    ['qqq'];

Output:

$var = // Comment // Comment // Comment
    // Comment
    // Comment
    // Comment
    // Comment
    $var['foo']['bar']['baz']['qqq'];

Expected behavior:

$var =
  $var[
    // Comment
    "foo"
  ][ // Comment
    // Comment
    "bar"
  ][ // Comment
    // Comment
    "baz"
  ][ // Comment
    // Comment
    "qqq"
  ];

As prettier

Start by reproducing the reported PHP input with the Prettier PHP plugin and inspect the offsetlookup handling named in the issue. Compare the formatter output with the expected output, and consider the work complete when comments remain attached to the corresponding array offsets without being collapsed into the assignment line.