Got underscore hints into my terminal game (Rust)

The problem was, it was very difficult to determine how many characters to guess, but now it's clearly indicated.

I used a simple little algorithm to get it to format it just the way I wanted! With rust, it was fairly easy to build out my intent, using psuedocode first, and then translate that into imperative statements, blocked into functional code.

edit: oops im still calling the whitespace asterisks in one spot XD