Dead link in documentation

Dear Lilypond Devs, I'm reading Lilypond - Extending, and trying to learn a bit of Scheme to achieve my aims. At the bottom of the page https://lilypond.org/doc/v2.19/Documentation/extending/scheme-simple-data-types there is the following sentence: There are additional Scheme data types

Incorrect mail link in documentation

Dear Lilypond Devs, I'm reading the "Lilypond - Extending" docs for 2.19.84 and I went to report a possible bug. At the bottom of every page there is a bug reporting link in this sentence: We welcome your aid; please help us by reporting errors to our bug