I'd like to see the following lines added as tests:
```php
$foo = 'abc' . "{$foo}bar";

$foo = "{$foo}bar" . 'abc';

$foo = 'abc' . "{$foo}bar";

$foo = "{$foo}bar" .
'abc and a bunch more characters to make this take up >144 when concatenated to the previous line';

$foo = 'abc and a bunch more characters to make this take up >144 when concatenated to the next line'
. "{$foo}bar";

$foo = 'First line
Second line' . 'additional';

$foo = 'First line
Second line a bunch of characters to make this line take up <144 characters but enough that when concatenated with the previous line it is >144' .
'additional';


$foo = 'First line
Second line a bunch of characters to make this line take up >144 characters' .
'additional';
```