Two spacer

Someone who inserts two spaces after a full stop when typing meaning someone then has to delete all the extra spaces after. Also known as a double spacer or scum of the earth.

Oh no, we just gave her the job and then realised she's a two spacer

two-spacer

A person that follows the traditionalist writing style which includes two spaces after a period.

I bet two-spacers are the type of people that made Pandora accounts and never even tried Spotify.