LRM spotted on Special:Contributions
Per http://www.w3.org/TR/its/#directionality we should avoid use of RLE and LRE (getDirMark()) and use html tags when is needed.
It is discussed why we should avoid direction control characters on http://www.w3.org/International/questions/qa-bidi-controls.en.php and http://www.w3.org/TR/html-bidi/
I think we must deprecate use of getDirMark() and getDirMarkEntity() on MediaWiki also.
Currently MediaWiki is using getDirMark() on these pages:
/includes/parser/Parser.php (is not critical)
And use of getDirMarkEntity()
AFAICS it is easy/possible to remove these usages by replacing them with suitable HTML tags and CSS styles.
Attachment of this bug is a screenshot of Chrome (a new version, after https://bugs.webkit.org/show_bug.cgi?id=93888) that shows useless LREs.