Use map syntax in comprehensions instead of maps:put/3
Use map syntax in comprehensions instead of maps:put/3

Signed-off-by: José Valim <0c2436ea76ed86e37cc05f66dea18d48ef390882@plataformatec.com.br>

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