Fix tests

Author: sylvestre

tests/by-util/test_stat.rs

@@ -361,17 +361,13 @@ fn test_quoting_style_locale() {
     ts.ucmd()
         .env("QUOTING_STYLE", "locale")
         .args(&["-c", "%N", "'"])
-        .run()
-        .no_stderr()
-        .stdout_is("'\\''\n")
-        .succeeded();
+        .succeeds()
+        .stdout_only("'\\''\n");
 
     ts.ucmd()
         .args(&["-c", "%N", "'"])
-        .run()
-        .no_stderr()
-        .stdout_is("\"'\"\n")
-        .succeeded();
+        .succeeds()
+        .stdout_only("\"'\"\n");
 }
 
 #[test]
@@ -395,11 +391,11 @@ fn test_printf_octal_2() {
 }
 
 #[test]
-fn test_printf_hex_3() {
+fn test_printf_incomplete_hex() {
     let ts = TestScenario::new(util_name!());
     ts.ucmd()
         .args(&["--printf=\\x", "."])
-        .run()
+        .succeeds()
         .stderr_contains("warning: incomplete hex escape");
 }