c3_FilteringSequence.java has confusing comment

[kevgilmore]

practical-reactor/exercises/src/test/java/c3_FilteringSequence.java

Line 44 in 895dd6d

Flux<String> strings = null;

The comment creates confusion, because we actually need to adjust the first line to remove the null and instead call the service and save the result to strings variable.

Something like this would be better.

        Flux<String> strings = null;
        mashed_data_service()
                //todo: replace null with mashed_data_service() call  and your solution.
                ;