Summary
- clarified URL;
- clarified pdf path;
- HTTP view of Isabelle PDF documentation;
- clarified signature;
- more robust;
- tuned message;
- clarified signature: more explicit section structure;
- clarified signature;
- clarified signature;
- tuned signature;
- tuned;
- clarified URL (again);
- more robust toplevel url: allow extra "/";
- clarified signature;