"Link" header is not properly displayed in apidoc when it contains []

https://archive.softwareheritage.org/api/1/origin/search/origin%20:%20%22python%22%20or%20keyword%20in%20[%22irc%22,%20%22ircv3%22]/?use_ql=true

displays:

Link ; rel="next"

but using curl, one sees the correct value:

Link: <https://archive.softwareheritage.org/api/1/origin/search/origin%20:%20%22python%22%20or%20keyword%20in%20%5B%22irc%22,%20%22ircv3%22%5D/?page_token=gsQFc2NvcmXLQDW%2BBkI5YHTEBHNoYTHZKDlkYTViYjEyNjc1ZmIxMzg4YTg2NDE1M2NlZGY1ZjI5ZWRmZjZjMWU%3D&use_ql=true>; rel="next"

---

Migrated from T3967 (view on Phabricator)