<title short> stops at the first colon, so it shortens Audible titles that
contain one just as readily as it drops Audible's subtitle, and distinct books
then collapse onto the same name. A colon cannot be searched for: the analyzer
discards punctuation and Lucene reads a colon in a query as a field separator.
Two bool index fields find the affected books instead.
Document how the two title tags differ, since <audible title> already drops
Audible's subtitle without ever cutting a title, and how to audit for names
that actually collide in a spreadsheet export.
Co-authored-by: rmcrackan <rmcrackan@gmail.com>
