* Internal links are resolved in tera markdown filter (close#1296#1316)
* Add a test for internal links in markdown filter
Co-authored-by: southerntofu <southerntofu@thunix.net>
* Replace hack for newline support in shortcodes with new hack
* Be a bit more space efficient/accurate with naming
* Boil newline/whitespace shortcode test down to the essentials
* Make sure the new \n and \s chars in old tests are properly represented
* Support markdown templates and shortcodes
* Refactoring .md/.html shortcode behaviour
* Add test for markdown shortcodes
* Add an html output test for markdown based shortcodes
* Add documentation for Markdown based shortcodes