JT 477f3be8df
Make if blocks work like a def-env (#4656)
* Make `if` work like a def-env

* Add some tests

* Add an example
2022-03-08 07:45:47 -05:00
..
2022-02-07 14:54:06 -05:00
2022-03-07 20:17:33 -05:00
2022-02-07 14:54:06 -05:00