Removed general case of #== primitive and replaced it with more specific but incomplete variants

The implementation of #== is incomplete in this trufflized version. The general case would need to test all more specific cases as well to be complete, and I don't do that yet.
[TODO-REPORT: is there a way to get that generated? all the necessary combinations?]

Signed-off-by: Stefan Marr <git@stefan-marr.de>