I've been having problems getting idea to use ruby language level 2.x for over year. In some projects it works, in others it does not. In all my projects I am using a ruby jdk with language level 2.x. But in some of the projects idea just not care. The docs show setting the ruby language level in the settings langauges/frameworks, but ruby does not appear there.
I have (if I recall) been able to create a project from scratch and get the language level to take, but never when importing a directory into a project.
Is there some magic incarnation that can make an existing project use the specified language level?