A GitHub Pages compatible way of adding anchors to your headings
...GitHub Pages doesn't support custom Jekyll plug-ins, is this plug-in whitelisted? This is all written in Liquid so need for any whitelisting. Worried about how weird or ugly a plug-in's CSS may be? These projects only generate semantically sane HTML for you to style. No need to worry about learning Ruby to edit a plug-in or getting your edits approved. It’s all Liquid, just change whatever HTML you want generated.