Completion not available on new line if previous line ends with a comment

In this case, the completion doesn't offer any method:
```java
List strings = Arrays.asList("one", "two", "three");

strings.stream() //
.mapToLong(String::length) // <--- COMMENT TO PREVENT FORMATTER FROM REMOVING LINE-BREAK
. <--- NO COMPLETION
```

If the previous line doesn't end with `//`, the completion works fine.
```java
List strings = Arrays.asList("one", "two", "three");

strings.stream() //
.mapToLong(String::length)
. <--- COMPLETION WORKS FINE
```

Not sure when exactly this bug was introduced, but late 2024 or early 2025.