libaugeas-ruby in Ubuntu 15.10 Wily?

I suggest you report a bug

From where did you install "the latest puppet version" that is failing due to an unmet dependency to libaugeas-ruby?

The puppet package for Ubuntu wily has the dependency on ruby-augeas and this is well working.

Apparently you are using some foreign version that does not fit to Ubuntu wily.

Yes, I tried to install the newest version from the puppet labs debian repository.
The version is not verified for wily, but for trusty.

You are encountering a problem with a package from a foreign source. This is outside the responsibility of Ubuntu, and you have to contact the support of the provider of that package (puppet labs). It is a weakness in their packages, or - let me formulate it this way - they have not yet provided a package that can be installed on Ubuntu wily.

I understand.
I know that I don't stand a chance to change the puppet package provided by puppet labs. And they will most likely not provide a wily-package.
That's why I tried to understand the problem enough, so that I might create or find the missing package myself.
So I was really just wondering, why the package libaugeas-ruby, which was installable on ubuntu 15.04 ist no longer installable in ubuntu 15.10

Your assumption formulated at the beginning is correct:
libaugeas-ruby was replaced by ruby-augeas, see https://launchpad.net/ubuntu/+source/libaugeas-ruby/+publishinghistory and click on triangle to open the first line.

I do not know what the difference is between the ruby-augeas 0.5.0-2build2 package for vivid ("Provides: libaugeas-ruby ...") and the ruby-augeas 1:0.5.0-3build1 package for wily (no "Provides:" any more).

If you know how to do that, you could try fiddling around in the control files of the packages, either adding a "Provides: libaugeas-ruby ..." to ruby-augeas, or changing "Depends: ... libaugeas-ruby ..." into "Depends: ... libaugeas-ruby | ruby-augeas ..." for puppet-common. (No guarantee that this will help, do it on your own responsibility.)

Thanks Manfred for the Infos.
That's exactly what I was looking for!