Regression in 2.8.1: Commas are removed from fn args in Sass maps.

[jgerigmeyer]

Probably caused by #9184?
Possible related to #13580?

Prettier 2.8.1
Playground link

--parser scss

Input:

@each $name, $hue in $hues {
  $map: map.merge(
    $map,
    (
      '#{$prefix}-#{$name}': blend.set($base, $hue: $hue),
    )
  );
}

Output:

@each $name, $hue in $hues {
  $map: map.merge($map, ('#{$prefix}-#{$name}': blend.set($base $hue: $hue)));
}

Expected behavior:

Comma should not be removed from blend.set($base, $hue: $hue) call.

[alexander-akait]

It was printed in one line, so why we should keep commas?

[jgerigmeyer]

@alexander-akait Sass function keyword arguments require comma-separators.

This is valid:

blend.set($base, $hue: $hue)

But this is invalid:

blend.set($base $hue: $hue)

https://sass-lang.com/documentation/at-rules/mixin#keyword-arguments

[alexander-akait]

I see, I am thinking about the last 👍