CS5B hw4pr4: tests updated to reflect correct guidelines
CS5B hw4pr4: tests updated to reflect correct guidelines

Before, these tests were the same ones from CS5 Gold, but the
guidelines are slightly different, so students were incorrectly failing
tests. They have been fixed now.

noellekimiko/HMC-Grader,noellekimiko/HMC-Grader,CSGreater-Developers/HMC-Grader,CSGreater-Developers/HMC-Grader,noellekimiko/HMC-Grader,noellekimiko/HMC-Grader,noellekimiko/HMC-Grader,CSGreater-Developers/HMC-Grader,CSGreater-Developers/HMC-Grader,CSGreater-Developers/HMC-Grader,noellekimiko/HMC-Grader