IDEA setup does not work for Scala 3.1 and 3.2

[informarte]

./mill mill.scalalib.GenIdea/idea

does not work properly when the project uses Scala 3.1 or 3.2: IDEA will think that the project uses Scala 2.

For Scala 3.2, the problem can be worked around by adding

<language-level>Scala_3_2</language-level>

to the properties section of .idea/libraries/scala3_library_3_3_2_0_jar.xml.

[lefou]

Strange, language level for Scala 3.1 should work since Mill 0.10.4 (#1856)

Newer versions should work after #2111 is merged.

[informarte]

Regarding Scala 3.1, it seems I looked at an older version of GenIdeaImpl.scala.