title: What uses a .md~ file extension
body: <p>I found a <code>*.md~</code> in my gitignore and can't remember when/why I added it. Of course googling <a href="https://www.google.com/search?btnG=1&amp;pws=0&amp;q=.md~+file+type" rel="nofollow">"*.md~"</a> is useless (I know .md is used for markdown files, but the tilde is what I'm curious about). Is this a temp file Vim generates or something?</p>