Changes

Summary

1. merged
2. proper setup for rule attribute;
3. more uniform simproc_setup: avoid vacuous abstraction over morphism, which sometimes captures context values in its functional closure;
4. clarified output of embedded values, e.g. for 'print_locale';
5. tuned: more antiquotations;
6. tuned;
7. tuned signature: more position information;
8. tuned;