IpuzCrosswordfix_clues

Ensures that there are IpuzClues for every sequenctial run of across or down normal cells of two or more. This will potentially add or remove existing clues as necessary.

This method will do its best to persist clues where possible. It does that by keeping track of the cells that the prior clues used, and copying over their answers to any new cells occupying the same location. The oldclues will be unreffed by self, and should not be considered useful after this has been run.

ipuz_crossword_fix_numbering() should be called prior to calling this function, as this uses the existing numbering to annotate the created clues.

In addition, subclasses of IpuzCrossword may do further fixups.