The meaning of this project is to help new Linux users that come from Windows with files or directorys which names have uppercase letters or spaces in it and typing and auto-completing the name of that file or directory over the time can be a little annoying in the console.
The script acctualy loop the files and directories that are in the head directory and formats the name changing the uppercase letter with the same, but lowercase letter and the spaces with '_'.
Running sh format_files.sh in your linux terminal will change all the uppercase letters with lowercase letters and change the spaces between letters with underlines all the files's names that are contained in the head directory.
Example
Health App.py will look like health_app.py after.
I recomend to create an alias for this.