Rename players-of-game function to start with verb

Signed-off-by: Sebastian Crane <seabass-labrax@gmx.com>

src/game.clj

@@ -3,7 +3,7 @@
 
 (ns game)
 
-(defn players-of-game [state game]
+(defn get-players-of-game [state game]
   (get-in state [:games game]))
 
 (defn add-player-of-game [state game player]

test/game_test.clj

@@ -9,10 +9,10 @@
                           :quasi-rts #{"player-two" "player-four"}
                           :imaginary-rpg #{"player-one" "player-three" "player-four"}}})
 
-(deftest players-of-game-test
+(deftest get-players-of-game-test
   (is (=
        '#{"player-two" "player-four"}
-       (players-of-game test-state :quasi-rts))))
+       (get-players-of-game test-state :quasi-rts))))
 
 (deftest add-player-of-game-test
   (is (=