bug: Align all the arrows inside the same array

[VincentLanglet]

Close #4395
Close #5546

With my recent contributions (#6559, #6515, #6450, #6445, #6444), I really improved the way binary operator are of different "scope" use different placeholder.

For instance

$a = 1; // PLACEHOLDER_=_1
$b = 2; // PLACEHOLDER_=_1

if ($c = 3) { // PLACEHOLDER_=_2
    $d = [ // PLACEHOLDER_=_3
        1 => 1, // PLACEHOLDER_=>_1
        2 => 2, // PLACEHOLDER_=>_1
        // Comment
        33 => 3, // PLACEHOLDER_=>_1
        4 => [ // PLACEHOLDER_=>_1
            1 => 1, // PLACEHOLDER_=>_2
        ];
        44 => [ // PLACEHOLDER_=>_1
            1 => 1, // PLACEHOLDER_=>_3
        ];
        5 => 5, // PLACEHOLDER_=>_1
    ];
}

$e = 3; // PLACEHOLDER_=_1

So it would be now possible to align the operator of a same scope, even if it's not in the following line.

I never saw someone reporting an issue for

$a = 1;
$b = 2;

$cc = 3;

not fixed to

$a  = 1;
$b  = 2;

$cc = 3;

but for => it's kinda different.

I created #4395, got some thumbs up, and there is also #5546

I see three solutions:

1. Not merging this, and keeping untouched:

$a = [
     1 => [
     ],
     111111 => [],
];

2. Merging this, and fixing the previous example to

$a = [
     1      => [
     ],
     111111 => [],
];

3. Creating another option, something like a align_scoped_single_space
   I think this is the worst solution because

• It would require a align_scoped_single_space and a align_scoped_single_space_minimal
• It may have only sens/be useful for =>, since

$variable = 1;
// 20 lines of code

$result = 1;

fixed to

$variable = 1;
// 20 lines of code

$result   = 1;

wasn't requested so far/could be weird.

I'd like to heard your opinion on this if you have time @SpacePossum (cc @julienfalque)

[coveralls]

Coverage increased (+0.0004%) to 92.883% when pulling 2209945 on VincentLanglet:alignArrows into 52dc232 on FriendsOfPHP:master.

[VincentLanglet]

Friendly ping,
Do you have tome to review this bugfix @julienfalque @keradus ?

[julienfalque]

Thank you @VincentLanglet.

[Gavrisimo]

Is it possible to revert this change? See this issue for details: #6716