Proper lists in `for`

[kizu]

This example from Sass docs is not converted properly:

@each $animal in puma, sea-slug, egret, salamander {
  .#{$animal}-icon {
    width: 10px;
  }
}

right now gives

for $animal in puma, sea-slug, egret, salamander
  .{$animal}-icon
    width: 10px

which returns an error as Stylus do not understand the comma list inside for, so we need to convert it to a proper Stylus list, like this one:

for $animal in (puma sea-slug egret salamander)
  .{$animal}-icon
    width: 10px

[samccone]

thanks @kizu