Sets the default value to `pp.fieldNotation.generalized` to `true`.
Updates tests, and fixes some minor flaws in the implementation of the
generalized field notation pretty printer.
Now generalized field notation won't be used for any function that has a
`motive` argument. This is intended to prevent recursors from pretty
printing using it as (1) recursors are more like control flow structures
than actual functions and (2) generalized field notation tends to cause
elaboration problems for recursors.
Note: be sure functions that have an `@[app_unexpander]` use
`@[pp_nodot]` if applicable. For example, `List.toArray` needs
`@[pp_nodot]` to ensure the unexpander prints it using `#[...]`
notation.
@Kha We will probably have to write a handwritten formatter in the
future. The new test shows some limitations with `do`, `else if`, ...
where we want the output
```
if x == 0 then do
IO.println "foo"
IO.println "zero"
else if x % 2 == 0 then do
IO.println x
IO.println "even"
else do
IO.println x
IO.println "odd"
```
