Remove tail return statements.

src/expand/expand.rs

@@ -123,7 +123,7 @@ pub fn uumain(args: Vec<String>) -> i32 {
 
     expand(Options::new(matches));
 
-    return 0;
+    0
 }
 
 fn open(path: String) -> BufReader<Box<Read+'static>> {

src/mv/mv.rs

@@ -352,5 +352,5 @@ fn existing_backup_path(path: &Path, suffix: &String) -> Path {
     if test_path.exists() {
         return numbered_backup_path(path);
     }
-    return simple_backup_path(path, suffix);
+    simple_backup_path(path, suffix)
 }

src/nproc/nproc.rs

@@ -82,6 +82,5 @@ pub fn uumain(args: Vec<String>) -> i32 {
         cores -= ignore;
     }
     println!("{}", cores);
-
-    return 0
+    0
 }

src/tsort/tsort.rs

@@ -109,7 +109,7 @@ pub fn uumain(args: Vec<String>) -> i32 {
         println!("{}", x);
     }
 
-    return 0
+    0
 }
 
 // We use String as a representation of node here

src/unexpand/unexpand.rs

@@ -114,7 +114,7 @@ pub fn uumain(args: Vec<String>) -> i32 {
 
     unexpand(Options::new(matches));
 
-    return 0;
+    0
 }
 
 fn open(path: String) -> BufReader<Box<Read+'static>> {