Improve docs for tuples
Improve docs for tuples

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