Format + Spring Checkstyle checks combined fail with nullable varags

This code here:

```java
private static byte[] bytes(int @Nullable... elements) {
```

(which passes checkstyle)

formats to

```java
private static byte[] bytes(int @Nullable ... elements) {
```

(note the whitespace before the `...`)

which fails checkstyle with:

```
PemPrivateKeyParser.java:324:59: '...' is preceded with whitespace. [NoWhitespaceBefore]
```

Related to #435.