#19 how flexible is '-u'

[richard]

If I start THE with the '-u' flag, then change the length of a display line, can I safely save the result? Basically, I envision using this technique when a text file line is too long for "width" (html is notorious for this). I'd edit the file with '-u', add and delete stuff, split lines (by inserting x0A bytes) as necessary, and save the result.