AssertTrueInstanceofToAssertInstanceOf should not output "matched"

I activated org.openrewrite.java.testing.junit5.AssertTrueInstanceofToAssertInstanceOf on https://github.com/JabRef/jabref/commit/1ed081f4e9c2e0f19719ea056eec868c50fcd4f1

Output: An endless list of

```
matched 
matched 
matched 
matched 
matched 
matched 
matched 
matched 
matched 
matched 
matched 
```

I think, this output should be removed, shouldn't it?