longparas: STRING_LEN here means text len, so expand to just that

Change-Id: Iec55f8976ca180e380c9679c561aae61c0607520
longparas: weed out xub_StrLen in pdf writer

Change-Id: I3570f653ec44edcf0a215ffcac2017b9a5a3544a
longparas: drop xub_StrLen from fields

Change-Id: Icd6dbc9b374df3e528dc22afa07be72d7fc89ca7
longparas: stop tuncating large html files

Change-Id: I0ad9422d574c8629953fd95f0d334617c042c60f