Properly fix line break in strings.

lib/string.ex

@@ -169,7 +169,7 @@ module String
     def inspect
       list = Erlang.binary_to_list(self)
       if Erlang.io_lib.printable_unicode_list(list)
-        <<$\", gsub(~r{("|#|\n|\r)}, "\\\\\\1")|binary, $\">>
+        <<$\", gsub(~r{("|#)}, "\\\\\\1").gsub(~r{\n}, "\\\\n")|binary, $\">>
       else
         Erlang.io_lib.format($"~w", [self]).to_bin
       end

test/elixir/string_test.exs

@@ -97,7 +97,7 @@ three
     "<<1,2,3>>" = <<1,2,3>>.inspect
     "\"f\\\"o\\\"o\"" = "f\"o\"o".inspect
     "\"f\\\#o\"" = "f#o".inspect
-    "\"f\\\no\"" = "f\no".inspect
+    "\"f\\no\"" = "f\no".inspect
   end
 
   def to_atom_test