Each span has class verdict and a class for the status, which the site's
stylesheet colours. The text is pass, open, FAIL or UNTESTED, so the
verdict remains readable where the class is ignored.
Usage
verdict_html(status)
Arguments
status
Character vector of statuses: "pass", "open", "fail" or
"undeclared". Any other value is an error.
Value
A character vector with one span per element of status.
