* Update LANG markers regex
* update regex to remove extra newlines from codeblocks
* revert regex in build-static-content
* remove nested codeblock
* update whitespace in changed codeblock
* update regex replace to match indentation on LANG tags
* update regex, add error if markdown was compiled with nested codeblocks
* Revert lang marker regex
* remove newlines before codeblocks in lists
* Update error, move LANG tag regex replace
* update comment to clarify what we mean by nested codeblocks
Co-authored-by: Mike McNeil <mikermcneil@users.noreply.github.com>