* Closes#1597
* Closes#1624
* Closes#1633
The tutorial uses syntax which has not been implemented yet: it depends
on
- #1637,
- #1716,
- #1639,
- #1638.
The tutorial also assumes the following issues are done:
- #1720, and
- #1701.
Co-authored-by: Jonathan Cubides <jonathan.cubides@uib.no>
* remove ≔ from the language and replace it by :=
* revert accidental changes in juvix input mode
* update stdlib submodule
* rename ℕ by Nat in the tests and examples
* fix shell tests