Add more test cases to invalid interpolation
Add more test cases to invalid interpolation

pedrosnk/elixir,michalmuskala/elixir,joshprice/elixir,pedrosnk/elixir,lexmag/elixir,kelvinst/elixir,kimshrier/elixir,kelvinst/elixir,lexmag/elixir,elixir-lang/elixir,ggcampinho/elixir,ggcampinho/elixir,kimshrier/elixir