Changes from Mercurial (hg http://isabelle.in.tum.de/repos/isabelle/ default)
Summary
- proper Thm.trim_context / Thm.transfer;
- proper Thm.trim_context / Thm.transfer;
- tuned;
- tuned Isabelle/ML;
- more informative position information;
- tuned;
- more informative position information;
- clarified context tracing; proper finish: purge inactive entries;
- more operations;
- proper system options to control context tracing/timing;