2001-10-24 Havoc Pennington <hp@pobox.com>
* gtk/gtktextiter.c (gtk_text_iter_backward_chars): if we move to
the front of a segment, use the "slow" technique for moving
backward, so we don't mess up the any_segment field in the iter.
Fixes#57707
* tests/testtextbuffer.c: add code to detect #57707, to avoid
regression