Cleaned up code style for readability.

src/main/java/edu/unl/cse/console/Console.java

src/main/java/edu/unl/cse/console/example/TicTacToe.java

src/test/java/edu/unl/cse/console/BoxTest.java

src/test/java/edu/unl/cse/console/ConsoleTest.java

src/test/java/edu/unl/cse/console/example/TicTacToeTest.java