StripNewlineWithinClassBody adds rogue closing curly bracket when a "class" named argument is used in the body of a function

e.g.,

`StripNewlineWithinClassBody` disabled:

```php
function bar($class) {
    echo $class;
}

function foo() {
    bar(class: 'baz');
}

// EOF
```

`StripNewlineWithinClassBody` enabled:

```php
function bar($class) {
    echo $class;
}

function foo() {
    bar(class: 'baz');
}

// EOF
}
```