Changes

Changes from Mercurial (hg https://isabelle.in.tum.de/repos/isabelle/ default)

Summary

1. added alias wfp for wfP
2. merged
3. added lemmas wf_on_antimono, wf_on_antimono_strong, wfp_on_antimono, wfp_on_antimono_strong, wf_on_subset, and wfp_on_subset
4. start scheduled jobs earlier, if possible;
5. tuned proofs
6. added lemmas wfP_iff_ex_minimal, wf_iff_ex_minimal, wf_onE_pf, wf_onI_pf, wf_on_iff_ex_minimal, and wfp_on_iff_ex_minimal
7. merged
8. added definitions wf_on and wfp_on as restricted versions of wf and wfP respectively
9. read/write proper schedule date (amending 9da3019e1ee5);
10. allow read/write of schedule in build (read via option, write from tool);
11. file representation for schedule (e.g., for generating from external tool);
12. proper median/mean time;
13. remove schedule outdated limit: delay is sufficient;
14. tuned whitespace;
15. tie-breaking in schedule optimization to pick best schedule even when run-time is dominated by large task (e.g., session with long timeout but no data yet);
16. tuned;
17. remove old build before generating schedule;
18. unused;