Create new tarball to update the official manual online at developer.gnome.org
The official manual of jhbuild is not up-to-date on: https://developer.gnome.org/jhbuild/
The latest jhbuild tarball was for version 3.15: https://download.gnome.org/sources/jhbuild/
library-web needs a new tarball, I think, in order to update the docs on the website. (It cannot do it from the git master branch of jhbuild, I think).
I can give it a try, to create a new tarball of jhbuild. Since it hasn't been done in a while, there may be some issues.
BTW, is the latest version of the manual available somewhere else on the web?