I looked at Inline Hyperlinks by Daniel Stelzer, which I should’ve done before posting, and it’s the updated version of Inline Hyperlinks by Erik Temple, including the modification I made. So ignore my post (I edited it and removed my file) and go get Daniel Stelzer’s version.
Sorry about this! We are working on a new extension site so it won’t be so messy and confusing to find versions of extensions that work with the version of Inform, but it’s a work in progress and this extension isn’t on it yet.