[RU] bsics/pipe-operator: improvements (#1780)
[RU] bsics/pipe-operator: improvements (#1780)


nscyclone/elixir-school,nscyclone/elixir-school,doomspork/elixir-school,doomspork/elixir_school,doomspork/elixir-school,nscyclone/elixir-school,doomspork/elixir_school,nscyclone/elixir-school,doomspork/elixir-school,doomspork/elixir_school