Improve docs for maps
Improve docs for maps

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