Adds id param to audio shortcode
Hashes are prefixed in the form `#audio-<ID>`
E.g. add `id="my-talk"` when calling the audio shortcode and then reference it using [link to my talk audio](#audio-my-talk)
Fix Editorconfig auto-added EOF new line to render-link hook, causing whitespace to begin appearing after links - particularly noticeable when there is punctuation after a link.