@8ef3d9ae Oh, I am very reluctant too 😊
Adding a space between words in an email's subject line still gives me Angst since that is used as a file name if saved outside a database. Things have changed, but I receive files from students that contain dots, comma's (???) and much more.
I one day received a file from a client via email to use in their website. File name was (translated) 'tarara boom tarara boom! Trumpet sounds... I am a little elephant in the forest! Tarara boom! .wav'. 
Renamed it.