bpo-35079: Revise difflib.SequenceManager.get_matching_blocks doc (GH-10144)


Specify that blocks are non-overlapping. Change '!=' to '<'.
(cherry picked from commit d9bff4e81b8ca36fe6c4e90c0b9cf02bc020e713)

Co-authored-by: Terry Jan Reedy <tjreedy@udel.edu>
2 files changed