How to fix typos on main site documentation pages

I wanted to fix a typo on
http://ionicframework.com/docs/api/directive/ionSideMenuContent/
when I click the Improve this Doc button I get sent to
https://github.com/driftyco/ionic/edit/master/js/ext/angular/src/directive/ionicSideMenu.js#L193

What is it that I don’t understand, or more specifically since the answer to that last question might be infinitely long, could someone point me to a how to for reporting/fixing typos on the main site.