PHP 7.4 fn closure invalid scope closer with ternary

[michalbundyra]

Example:

<?php

$fn = fn ($a) => $a ? fn () : string => 'a' : fn () : string => 'b';

var_dump($fn(0)()); // string(a)
var_dump($fn(1)()); // string(b)

so what we should have here is:

• ✅ scope_closer for first fn should be the final ;
• ❌ scope_closer for "then" fn should be : (else) - it is the final ; instead
• ✅ scope_close for "else" fn should be the final ;

Related to #2523

[gsherwood]

I've pushed a fix for this case. I'm not super happy with the code, but I feel like there are going to be a few more cases like this, so I can refactor later. At least there are tests cases for it.

Thanks a lot for reporting this.