tests: update to clap 4

tests/common/util.rs

@@ -1856,6 +1856,7 @@ mod tests {
     // This error was first detected when running tail so tail is used here but
     // should fail with any command that takes piped input.
     // See also https://github.com/uutils/coreutils/issues/3895
+    #[cfg(feature = "tail")]
     #[test]
     #[cfg_attr(not(feature = "expensive_tests"), ignore)]
     fn test_when_piped_input_then_no_broken_pipe() {

tests/test_util_name.rs

@@ -21,7 +21,7 @@ fn execution_phrase_double() {
         .unwrap();
     assert!(String::from_utf8(output.stderr)
         .unwrap()
-        .contains(&format!("USAGE:\n    {} ls", scenario.bin_path.display(),)));
+        .contains(&format!("Usage: {} ls", scenario.bin_path.display(),)));
 }
 
 #[test]
@@ -36,8 +36,9 @@ fn execution_phrase_single() {
         .arg("--some-invalid-arg")
         .output()
         .unwrap();
+    dbg!(String::from_utf8(output.stderr.clone()).unwrap());
     assert!(String::from_utf8(output.stderr).unwrap().contains(&format!(
-        "USAGE:\n    {}",
+        "Usage: {}",
         scenario.fixtures.plus("uu-ls").display()
     )));
 }