Remove range overlap in Logger truncation (#15221)

Author: cuiweixie

lib/logger/lib/logger/utils.ex

@@ -228,7 +228,7 @@ defmodule Logger.Utils do
   end
 
   def truncate_n(int, n) when int in 0..127, do: {int, n - 1}
-  def truncate_n(int, n) when int in 127..0x07FF, do: {int, n - 2}
+  def truncate_n(int, n) when int in 128..0x07FF, do: {int, n - 2}
   def truncate_n(int, n) when int in 0x800..0xFFFF, do: {int, n - 3}
   def truncate_n(int, n) when int >= 0x10000 and is_integer(int), do: {int, n - 4}