Refactor tap examples and use defer="defer" to be xhtml complient #561

Job	Run time
build (mysql, 3.9)	5m 4s
build (mysql, 3.12)	5m 20s
build (postgres, 3.9)	5m 17s
build (postgres, 3.12)	5m 34s
Indicate completion to coveralls	0s
	21m 15s

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