Summary
- bit accessor and fundamental properties
- merged
- more informative spec rules: optional name; clarified signature; more thorough treatment of Thm.trim_context vs. Thm.transfer;
- proper theory context, e.g. for Thm.transfer;
- more structural integrity;
- tuned
- reduced imports; deleted unusewd minor lemmas for that purpose
- tuned
- reduced imports and removed unused material
- tuned