WAI Markdown Extension

This extension makes two things possible:

1. You can refer to pages by their reference in their frontmatter (including fragment identifiers).

2. You can use double square brackets to insert the actual title of the referenced page. For example: [Standards](/standards-guidelines/) would take the actual title of the W3C Accessibility Standards Overview page and insert it instead of using ”Standards”.

This supports translations. When a linked page is translated, then the title of the translated page is inserted. When the linked page is not translated, then “(in English)” is added after the link.