source-gen: Specify alias cases in multiple arguments
source-gen: Specify alias cases in multiple arguments

Changes the syntax of alias generation from

    ./alias Name 'Case1|Case2|Case3'

(quoting necessary to avoid shell piping; just generally annoying) to

    ./alias Name Case1 Case2 Case3

(We can’t do this for abstract classes because they can have members.)

ceylon/ceylon.ast