disallow pending hyps;
disallow pending shyps, with option to override the check;
tuned message;
Subject: Announcing Isabelle2018
To: isabelle-users@cl.cam.ac.uk
Isabelle2018 is now available.
This version introduces many changes over Isabelle2017: see the NEWS
file for further details. Some notable points:
* FIXME.
You may get Isabelle2018 from the following mirror sites:
Cambridge (UK) http://www.cl.cam.ac.uk/research/hvg/Isabelle
Munich (Germany) http://isabelle.in.tum.de
Sydney (Australia) http://mirror.cse.unsw.edu.au/pub/isabelle
Potsdam, NY (USA) http://mirror.clarkson.edu/isabelle