Improve docs for Dict
Improve docs for Dict

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