 
       import Math
       my_number = fn ->
-        IO.puts "Returning 5"
+        IO.puts("Returning 5")
         5
       end
-      IO.puts "Got #{squared(my_number.())}"
+      IO.puts("Got #{squared(my_number.())}")
 
   The example above will print:
 


        defmacro no_interference do
          quote do
            M.new
          end
        end
      end

      require Hygiene
      Hygiene.no_interference #=> %{}

  Notice that, even though the alias `M` is not available
  in the context the macro is expanded, the code above works

        end
      end

      Lazy.return_length()
      #=> 5

  ## Stacktrace information

