Summary
- less verbosity by default, notably for regular "isabelle build -o document";
- clarified message: old-style log is usually empty;
- clarified messages, notably for session "Intro";
- merged
- more general program start message; progress on "Creating directory";
- clarified terminology of inlined "PROGRAM START" messages;
- isabelle update -u cite -l "";
- less ambitious parallelism: avoid exhaustion of memory (40GB total);
- clarified GUI;
- clarified GUI: omit pointless search buttons, as real output is shown as markup;
- more uniform use of Symbol.output, even in situations where its Symbol.encode is usually redundant;
- merged
- More new material thanks to Manuel
- merged
- tuning