Fix small curly typo in tuple docs (#8162)

tmikeschu · josevalim · commit ac41358b5a0b · 2018-09-03T16:54:56.000+02:00
diff --git a/lib/elixir/lib/tuple.ex b/lib/elixir/lib/tuple.ex
@@ -36,7 +36,7 @@ defmodule Tuple do
       tuple = {:ok, :example}
 
       # Avoid
-      Tuple.insert_at(tuple, 2, %{}}
+      Tuple.insert_at(tuple, 2, %{})
 
       # Prefer
       {:ok, atom} = tuple
