[HTML 4.01 recommends](http://www.w3.org/TR/1999/REC-html401-19991224/appendix/notes.html#h-B.2.2) using `;` to avoid issues with escaping `&` in HTML.  Github API's examples use `&`.  I've changed my habit to use `;`.  Doesn't really matter, change it if it makes you comfortable.