[PHP 7.3] Add trailing comma in multi-line function call

[ntzm]

 foo(
     1,
-    2
+    2,
)

Only for PHP 7.3+

[kunicmarko20]

Any idea how to detect a function call? in isCandidate method I am getting:

[2]=>
  object(PhpCsFixer\Tokenizer\Token)#34 (4) {
    ["content":"PhpCsFixer\Tokenizer\Token":private]=>
    string(3) "foo"
    ["id":"PhpCsFixer\Tokenizer\Token":private]=>
    int(319)
    ["isArray":"PhpCsFixer\Tokenizer\Token":private]=>
    bool(true)
    ["changed":"PhpCsFixer\Tokenizer\Token":private]=>
    bool(false)
  }
  [3]=>
  object(PhpCsFixer\Tokenizer\Token)#33 (4) {
    ["content":"PhpCsFixer\Tokenizer\Token":private]=>
    string(1) "("
    ["id":"PhpCsFixer\Tokenizer\Token":private]=>
    NULL
    ["isArray":"PhpCsFixer\Tokenizer\Token":private]=>
    bool(false)
    ["changed":"PhpCsFixer\Tokenizer\Token":private]=>
    bool(false)
  }

T_STRING followed by ( , not sure this is reliable to detect a function call?

[kubawerlos]

It's not that simple -> #4238