Add missing typespecs and fix error in docs (#7259)
Add missing typespecs and fix error in docs (#7259)


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