Unit-test framework has learned a simple control structure to allow
embedding test statements in-line instead of having to create a new
function to contain them.
* rs/unit-tests-test-run:
t-strvec: use if_test
t-reftable-basics: use if_test
t-ctype: use if_test
unit-tests: add if_test
unit-tests: show location of checks outside of tests
t0080: use here-doc test body