>>> check domains = +test_domains
>>> a.b.c in "lsearch; TESTSUITE/aux-fixed/0325.data"? yes (matched "lsearch; TESTSUITE/aux-fixed/0325.data")
>>> a.b.c in "+test_domains"? yes (matched "+test_domains")
>>> check domains = +test_domains
>>> a.b.c in "lsearch; TESTSUITE/aux-fixed/0325.data"? yes (matched "lsearch; TESTSUITE/aux-fixed/0325.data")
>>> a.b.c in "+test_domains"? yes (matched "+test_domains")