Summary
- simplified;
- merged
- non-executable files;
- clarified formal comments;
- prefer formal comments; avoid outer verbatim token: Thy_Output.token / Antiquote.parse fails due to partitioning in operator ranges;
- clarified formal comment, based on version before 3ccb204d9c5f and educated guessing;
- prefer formal comments;
- \usepackage[normalem]{ulem} is already provided by isabelle.sty (Isabelle/efc9ec539224);
- removed old/unused clones of Isabelle distribution files;