Add function to check if a string contains...
Add function to check if a string contains...

...one element in an array of strings.

Used to check if HTML response bodies contain one of the strings we
specify in an array.

alphagov/cdn-acceptance-tests,mikepea/cdn-acceptance-tests,mikepea/cdn-acceptance-tests,alphagov/cdn-acceptance-tests,alphagov/cdn-acceptance-tests,mikepea/cdn-acceptance-tests,mikepea/cdn-acceptance-tests,alphagov/cdn-acceptance-tests