[PL] Comprehensions one more time (#365)
[PL] Comprehensions one more time (#365)

* [PL] translation of comprehention

* Fix typos and style

* Fix odwzorowania to składania

nscyclone/elixir-school,holsky/elixir-school,erickgnavar/elixir-school,ElixirVietnam/elixir-school,holsky/elixir-school,huydx/elixir-school,huydx/elixir-school,psantos10/elixir-school,doomspork/elixir-school,nscyclone/elixir-school,erickgnavar/elixir-school,yuriibodarev/elixir-school,holsky/elixir-school,erickgnavar/elixir-school,doomspork/elixir_school,doomspork/elixir-school,doomspork/elixir_school,psantos10/elixir-school,nscyclone/elixir-school,nscyclone/elixir-school,huydx/elixir-school,doomspork/elixir-school,ElixirVietnam/elixir-school,doomspork/elixir_school,yuriibodarev/elixir-school,psantos10/elixir-school,ElixirVietnam/elixir-school,yuriibodarev/elixir-school