refactor: Change suites 1 and 3 testing blocks
refactor: Change suites 1 and 3 testing blocks

Edited code to reflect comments about proper styling overall and a
potential error in suite 3. Code in suite 3 could be further
refactored to account for the probability that there may not be a
preset of indexed feeds to reference for testing.

tswei/frontend-nanodegree-feedreader,tswei/frontend-nanodegree-feedreader