Fix off-by-one bug in memmove() call in bytes_insert(). Fix by Pete Shinners (for his own bug :-).
Fix off-by-one bug in memmove() call in bytes_insert().
Fix by Pete Shinners (for his own bug :-).

sk-/python2.7-type-annotator,sk-/python2.7-type-annotator,sk-/python2.7-type-annotator