Properly (un)escape textarea data
Properly (un)escape textarea data

Previously, escape sequences (like \n) generated by PacForms were not
handled correctly when loading textarea element; writing out the form
data file also did not change real newlines into \ns.  This commit fixes
that by using a pair of escape and unescape functions.

pack-it-forms/pack-it-forms,pack-it-forms/pack-it-forms