Summary
- merged
- updated documentation;
- avoid Isabelle symbols in URL;
- formal URLs;
- tuned spacing;
- modernized tags: default scope excludes proof;
- report document tags as seen in the text (not the active tag of Thy_Output.present_thy);
- support "tag" marker with scope;
- tidying up messy proofs about group element order
- merged
- simpler and stronger proofs