Currently it's downloading markdown in a .txt file.
I understand that some people might not know what a markdown file is, but it would be nice for those people who want to have it open with the correct (markdown) text editor of their chosing. or be able to drag it into their markdown based note taking app directly.
EDIT (after nobodywasishere's reply): instead I propose the user gets the option download it a variety of formats. So in the settings there would be an option where the user can choose the format: