fix ~ remove redundant clone()

util_name!() and execution_phrare!() now return a String directly

src/uu/du/src/du.rs

@@ -466,7 +466,7 @@ pub fn uumain(args: impl uucore::Args) -> UResult<()> {
 
     let options = Options {
         all: matches.is_present(options::ALL),
-        util_name: util_name!().to_string(),
+        util_name: util_name!(),
         max_depth,
         total: matches.is_present(options::TOTAL),
         separate_dirs: matches.is_present(options::SEPARATE_DIRS),

src/uu/logname/src/logname.rs

@@ -36,7 +36,7 @@ fn get_userlogin() -> Option<String> {
 static SUMMARY: &str = "Print user's login name";
 
 fn usage() -> String {
-    execution_phrase!().to_string()
+    execution_phrase!()
 }
 
 pub fn uumain(args: impl uucore::Args) -> i32 {