VSCode Version: 1.13.1
cpptools Version: 0.12.0
OS Version: Win10_1703

workspace
-- test_1.cpp
-- EN_folder
  -- test_2.cpp
-- 中文_文件夹
  -- test_3.cpp

中文_文件夹 means Chinese_folder

the test_1.cpp and test_2.cpp can Code Formatting
but test_3.cpp can't Code Formatting