NP_NULL_ON_SOME_PATH_FROM_RETURN_VALUE false positive when code is formatted on different lines

[gtoison]

As noted in #782 calls such as checkNotNull(get()); are correctly analyzed but when formatting on different lines they are not:

        Object c = checkNotNull(
                get()); // false positive

Objects.requireNonNull is correctly recognized since #2709 was merged

Concerning javax.annotation.Nullable its nullability is @Nonnull(when = When.UNKNOWN), my understanding is that this explains why it is ignored here. On the other end, the custom annotation from the sample is @Nonnull(when = When.MAYBE) so it is considered and flagged accordingly