Fix encoding

Author: zeyi2

clang-tools-extra/test/clang-tidy/checkers/modernize/use-std-print.cpp

@@ -55,10 +55,10 @@ void printf_deceptive_newline() {
 }
 
 void printf_utf8_text() {
-  // Non-ASCII UTF-8 in format string should not crash.
-  printf("你好世界\n");
+  // Hex encodes U+4F60 U+597D U+4E16 U+754C (Hello world) in UTF-8
+  printf("\xE4\xBD\xA0\xE5\xA5\xBD\xE4\xB8\x96\xE7\x95\x8C\n");
   // CHECK-MESSAGES: [[@LINE-1]]:3: warning: use 'std::println' instead of 'printf' [modernize-use-std-print]
-  // CHECK-FIXES: std::println("你好世界");
+  // CHECK-FIXES: std::println("{{.+}}");
 }
 
 void printf_crlf_newline() {
@@ -311,10 +311,10 @@ void fprintf_simple() {
 }
 
 void fprintf_utf8_text() {
-  // Non-ASCII UTF-8 in format string should not crash.
-  fprintf(stderr, "你好世界\n");
+  // Hex encodes U+4F60 U+597D U+4E16 U+754C (Hello world) in UTF-8
+  fprintf(stderr, "\xE4\xBD\xA0\xE5\xA5\xBD\xE4\xB8\x96\xE7\x95\x8C\n");
   // CHECK-MESSAGES: [[@LINE-1]]:3: warning: use 'std::println' instead of 'fprintf' [modernize-use-std-print]
-  // CHECK-FIXES: std::println(stderr, "你好世界");
+  // CHECK-FIXES: std::println(stderr, "{{.+}}");
 }
 
 void std_printf_simple() {