No trailing comma in single line

[dereuromark]

fn($a, $b,)

=>

fn($a, $b)

As per slevomat/coding-standard#1326

Also refs squizlabs/PHP_CodeSniffer#3477 (side effect of not having this sniff!)
We should be able to revert
0edfae1

We can start easy by checking if any closing token comes afterwards, ), ], or alike.