AoC: Different handling of indentation of code in `()` vs `{}` is confusing

[fridis]

I ran into this during 6 dec 24 Advent of Code:

This code

ignore i32->bool p->{if p = 3 then
                       say "hi"
                     false}

works as expected

 > ~/fuzion/work/build/bin/fz indentation_error3.fz 

while the same code using ()

ignore i32->bool p->(if p = 3 then
                       say "hi"
                     false)

fails parsing and produced indentation errors and type errors caused by the parser producing a wrong AST:

 > ~/fuzion/work/build/bin/fz indentation_error2.fz 

/home/fridi/fuzion/advent_of_code/fuzion_aoc/2024/06/indentation_error2.fz:3:22: error 1: Inconsistent indentation
                     false)

Indentation reference point is /home/fridi/fuzion/advent_of_code/fuzion_aoc/2024/06/indentation_error2.fz:1:22:
ignore i32->bool p->(if p = 3 then

While parsing: klammer, parse stack: klammer, bracketTerm, term, opTail, opExpr, operatorExpr (twice), expr, exprs, block (twice), lambda, plainLambda, callOrFeatOrThis, term, opTail, opExpr, operatorExpr (twice), actualSpace, actualSpaces, actualArgs, call (twice), callOrFeatOrThis, term, opTail, opExpr, operatorExpr (twice), expr, exprs, block (twice), unit


/home/fridi/fuzion/advent_of_code/fuzion_aoc/2024/06/indentation_error2.fz:2:24: error 2: Incompatible types in assignment
                       say "hi"

assignment to field : 'λ.call.result'
expected formal type: 'bool'
actual type found   : 'unit'
assignable to       : 'unit'
for value assigned  : 'say "hi"'
To solve this, you could change the type of the target 'λ.call.result' to 'unit' or convert the type of the assigned value to 'bool'.


/home/fridi/fuzion/advent_of_code/fuzion_aoc/2024/06/indentation_error2.fz:1:22: error 3: Incompatible types in assignment
ignore i32->bool p->(if p = 3 then

assignment to field : 'λ.call.result'
expected formal type: 'bool'
actual type found   : 'unit'
assignable to       : 'unit'
for value assigned  : ''
To solve this, you could change the type of the target 'λ.call.result' to 'unit' or convert the type of the assigned value to 'bool'.

3 errors.

[simonvonhackewitz]

see also #2283