Actual
curl -sI "https://en.wiktionary.org/api/rest_v1/page/definition/a" | grep -i \^content-type content-type: application/json
Expected
curl -sI "https://en.wiktionary.org/api/rest_v1/page/definition/a" | grep -i \^content-type Content-Type: application/json; charset=utf-8; profile="https://www.mediawiki.org/wiki/Specs/definition/0.8.0"