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

[latkin]

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.

[latkin]

I have a fix in progress, just trying all of the various test permutations...

[latkin]

Blah, this is not limited to type names with commas, spaces can cause incorrect encoding of + char, too. Logic around here is busted.