one of two users selecting impact choice now delivers non-impact end-lev...


#### What's this PR do?
Squashes two bugs: one of two users selecting the impact choice now delivers the non-impact end-level condition, each users choice set now only counted once when determining winning level choice-set. 

(Two out of four users selecting the impact choice still delivers the impact end-level condition, however.) 

#### How should this be manually tested?
Postman! Create a game, have two users join, have one select the impact choice-set, one select a non-impact choice-set. 

(Was also tested with four players.) 

#### What are the relevant tickets?
Jira SMS-60
Code cleanliness. Add a space after the `//` and capitalize `covers`. Not sure how others feel about this, but I also like to try to keep line lengths roughly <= 80 characters. So breaking this down into a multi-line comment would be nice.