"internal error: null: convTypeRefAux" in interactive when consuming quotation containing type name with commas or spaces #270

Found this when reviewing #250. Not caused by that change, but related.

If you create a DLL from the following (test.fs):

module Foo
type ``one, two, three``() = class end
let X = <@ ``one, two, three``() @>

Then consume it from script like so (test.fsx):

#r ".\\test.dll"
printfn "%A" Foo.X

You get internal error:

Note that there is no error if you consume Foo.X from a console app, it's specific to Interactive.