updated for version 7.4.528
Problem:    Crash when using matchadd() (Yasuhiro Matsumoto)
Solution:   Copy the match regprog.
Added tag v7-4-528 for changeset 5f49ac8426df
updated for version 7.4.529
Problem:    No test for what 7.4.517 fixes.
Solution:   Adjust the tests for breakindent. (Christian Brabandt)
Added tag v7-4-529 for changeset 72d5a533ec87