Acq: Yet more efforts to sanitize data for the EDI translator

Acq: Yet more efforts to sanitize data for the EDI translator

I specifically did this to address cases reported to me by Galen
Charlton in which get_li_attr_jedi() would return the string "nul", but
I hope this is a nail in the coffin for problems involving
JEDI-producing Action/Trigger templates feeding the EDI translator
strings that the latter doesn't like.

Signed-off-by: Lebbeous Fogle-Weekley <lebbeous@esilibrary.com>
Signed-off-by: Bill Erickson <berick@esilibrary.com>