Comment only, no change in behaviour.
strip() stops at str[0] rather than clearing it, which reads like an
off-by-one. It is deliberate: an empty field in an unload file means
NULL, so a column holding an empty or all-blank CHAR has to keep one
space to come back from LOAD as a value rather than a null.
Nothing said so, and the bound is an easy thing to "tidy up" while
working on unload formatting.
