Merge branch 'hasse/unicode_atoms/OTP-14285'

* hasse/unicode_atoms/OTP-14285:
  compiler: Handle (bad) Unicode parse transform module names
  kernel: Improve handling of Unicode filenames
  stdlib: Handle Unicode atoms in ms_transform
  stdlib: Improve Unicode handling of the Erlang parser
  stdlib: Handle unknown compiler options with Unicode
  stdlib: Handle Unicode macro names
  stdlib: Correct Unicode handling in escript
  dialyzer: Improve handling of Unicode
  parsetools: Improve handling of Unicode atoms
  stdlib: Handle Unicode atoms when formatting stacktraces
  stdlib: Add more checks of module names to the linter
  stdlib: Handle Unicode atoms better in io_lib_format
  stdlib: Handle Unicode atoms in c.erl

1 files changed, 3 insertions, 3 deletions

diff --git a/lib/parsetools/src/yecc.erl b/lib/parsetools/src/yecc.erl
index 48559ec402..36e33b52a4 100644
--- a/lib/parsetools/src/yecc.erl
+++ b/lib/parsetools/src/yecc.erl
@@ -2597,18 +2597,18 @@ format_symbol(Symbol) ->
     String = concat([Symbol]),
     case erl_scan:string(String) of
         {ok, [{atom, _, _}], _} ->
-            io_lib:fwrite(<<"~w">>, [Symbol]);
+            io_lib:fwrite(<<"~tw">>, [Symbol]);
         {ok, [{Word, _}], _} when Word =/= ':', Word =/= '->' ->
             case erl_scan:reserved_word(Word) of
                 true ->
                     String;
                 false ->
-                    io_lib:fwrite(<<"~w">>, [Symbol])
+                    io_lib:fwrite(<<"~tw">>, [Symbol])
             end;
         {ok, [{var, _, _}], _} ->
             String;
         _ -> 
-            io_lib:fwrite(<<"~w">>, [Symbol])
+            io_lib:fwrite(<<"~tw">>, [Symbol])
     end.
 
 inverse(L) ->