Improves Hello-World#279

Merged

arcuru merged 4 commits intoexercism:masterfrom

arcuru:hw_improve

Aug 3, 2019

Commits on Apr 27, 2019

Commits on May 5, 2019

Cleaning up hello().
arcuru
committed

Commits on Aug 3, 2019

Improving include guard description.
arcuru
committed