[pt] Fix typos in pt/lessons/basics/strings.md (#1964)
[pt] Fix typos in pt/lessons/basics/strings.md (#1964)


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