The rules text from the most-recently-released printing (the MRP standard). Each element is a
(release_date, text) pair for one printing that carries text; a null date sorts oldest so a
dated printing always wins over an undated one. Return None for an empty list.
- Parameters:
- dated_texts
list of tuple of (date or None, str) One (release_date, text) pair per printing of the card that has non-empty text.
- Returns:
- text
str or None The text on the newest printing, or None if there are no printings.