Use test functions in pg_rewind test module
Commit
61081e75c introduced pg_rewind along with the test suite, which
ensured that subroutines didn't incur more than one test to plan. Now
that we no longer explicitly plan tests (since
549ec201d), we can use
the usual Test::More functions.
Reviewed-by: Andrew Dunstan <andrew@dunslane.net>
Discussion: https://postgr.es/m/
AA527525-F0CC-4AA2-AF98-
543CABFDAF59@yesql.se