[Downgrade PHP 7.3] Trailing commas in function calls

[leoloso]

Feature Request

Downgrade new feature from PHP 7.3 to its equivalent PHP 7.2 code

Diff

$compacted = compact(
    'posts',
-    'units',
+    'units'
);

[quisse]

After some digging I can conclude that this is not possible using php-parser because php-parser isn't aware of the trailing comma AFAIK.
Any help would be appreciated.

[TomasVotruba]

Closed by #4273,

merged in #4796