Improve documentation of Dict module
Improve documentation of Dict module

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