add styling for queries which are run inside a transaction #596

Job	Run time
cs-stan / Coding Standard & Static Analysis	32s
testsuite / testsuite-linux (8.1, mysql, highest, false)	33s
testsuite / testsuite-linux (8.1, pgsql, highest, false)	24s
testsuite / testsuite-linux (8.1, sqlite, lowest, false)	21s
testsuite / testsuite-linux (8.2, mysql, false)	28s
testsuite / testsuite-linux (8.3, sqlite, highest, false)	24s
testsuite / testsuite-linux (8.4, mysql, highest, false)	32s
	3m 14s

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