My last ditch attempt at making sense out of this codebase by separating
the functions into files, should make the project easier to read, but
this'll probably be my last commit for hangman for a long while.
Submitting an empty guess would cause the game to print one of the two
"Already guessed" lines, now it checks for empty input and ignores it
accordingly.
Also, I assigned the guess variable to an empty string at the end of the
game() loop to reset it because I realized that inputting empty strings
after a single guess would cause the same bug to re-appear because the
variable hadn't changed from last attempt.