Remove tail return statements.

Per review feedback.

base64/base64.rs

@@ -89,7 +89,7 @@ pub fn uumain(args: Vec<String>) -> int {
         Version => version()
     }
 
-    return 0;
+    0
 }
 
 #[allow(dead_code)]

basename/basename.rs

@@ -86,7 +86,7 @@ pub fn uumain(args: Vec<String>) -> int {
 
     println(name.as_slice());
 
-    return 0;
+    0
 }
 
 fn strip_dir(fullname: &str) -> String {
@@ -99,7 +99,7 @@ fn strip_dir(fullname: &str) -> String {
         name.push_char(c);
     }
 
-    return name.as_slice().chars().rev().collect();
+    name.as_slice().chars().rev().collect()
 }
 
 fn strip_suffix(name: &str, suffix: &str) -> String {
@@ -111,5 +111,5 @@ fn strip_suffix(name: &str, suffix: &str) -> String {
         return name.slice_to(name.len() - suffix.len()).into_string();
     }
 
-    return name.into_string();
+    name.into_string()
 }

cat/cat.rs

@@ -81,7 +81,7 @@ pub fn uumain(args: Vec<String>) -> int {
 
     exec(files, number_mode, show_nonprint, show_ends, show_tabs, squeeze_blank);
 
-    return 0;
+    0
 }
 
 #[deriving(Eq, PartialEq)]
@@ -285,12 +285,12 @@ fn open(path: &str) -> Option<(Box<Reader>, bool)> {
     }
 
     match File::open(&std::path::Path::new(path)) {
-        Ok(f) => return Some((box f as Box<Reader>, false)),
+        Ok(f) => Some((box f as Box<Reader>, false)),
         Err(e) => {
             (writeln!(stderr(), "cat: {0:s}: {1:s}", path, e.to_str())).unwrap();
-            return None;
+            None
         },
-    };
+    }
 }
 
 struct UnsafeWriter<'a, W> {

cksum/cksum.rs

@@ -130,5 +130,5 @@ pub fn uumain(args: Vec<String>) -> int {
         }
     }
 
-    return exit_code;
+    exit_code
 }

comm/comm.rs

@@ -136,5 +136,5 @@ pub fn uumain(args: Vec<String>) -> int {
 
     comm(&mut f1, &mut f2, &matches);
 
-    return 0;
+    0
 }

cp/cp.rs

@@ -63,7 +63,7 @@ pub fn uumain(args: Vec<String>) -> int {
         Version => version(),
     }
 
-    return 0;
+    0
 }
 
 fn version() {

dirname/dirname.rs

@@ -68,5 +68,5 @@ directory).", opts).as_slice());
         println!("Try '{0:s} --help' for more information.", program);
     }
 
-    return 0;
+    0
 }

du/du.rs

@@ -86,7 +86,7 @@ fn du(path: &Path, mut my_stat: Stat,
 
     stats.push(Arc::new(my_stat));
 
-    return stats;
+    stats
 }
 
 #[allow(dead_code)]
@@ -367,5 +367,5 @@ Try '{program} --help' for more information.", s, program = program);
         print!("{}", line_separator);
     }
 
-    return 0;
+    0
 }

echo/echo.rs

@@ -66,7 +66,8 @@ fn convert_str(string: &str, index: uint, base: uint) -> (char, int) {
             }
         }
     }
-    return (to_char(&bytes, base), max_digits)
+
+    (to_char(&bytes, base), max_digits)
 }
 
 #[allow(dead_code)]
@@ -187,5 +188,5 @@ pub fn uumain(args: Vec<String>) -> int {
         println!("")
     }
 
-    return 0;
+    0
 }

env/env.rs

@@ -211,5 +211,5 @@ pub fn uumain(args: Vec<String>) -> int {
         print_env(opts.null);
     }
 
-    return 0;
+    0
 }

fold/fold.rs

@@ -83,7 +83,7 @@ pub fn uumain(args: Vec<String>) -> int {
         fold(files, bytes, spaces, width);
     }
 
-    return 0;
+    0
 }
 
 fn handle_obsolete(args: &[String]) -> (Vec<String>, Option<String>) {

groups/groups.rs

@@ -43,5 +43,5 @@ pub fn uumain(args: Vec<String>) -> int {
 
     group(get_pw_from_args(&matches.free), true);
 
-    return 0;
+    0
 }

head/head.rs

@@ -94,7 +94,7 @@ pub fn uumain(args: Vec<String>) -> int {
         }
     }
 
-    return 0;
+    0
 }
 
 // It searches for an option in the form of -123123

hostid/hostid.rs

@@ -84,7 +84,7 @@ pub fn uumain(args: Vec<String>) -> int {
         Version => version(),
     }
 
-    return 0;
+    0
 }
 
 fn version() {

hostname/hostname.rs

@@ -65,7 +65,7 @@ pub fn uumain(args: Vec<String>) -> int {
         _ => { help_menu(program.as_slice(), options); }
     };
 
-    return 0;
+    0
 }
 
 fn version() {

id/id.rs

@@ -195,7 +195,7 @@ pub fn uumain(args: Vec<String>) -> int {
         id_print(possible_pw, false, true, true)
     }
 
-    return 0;
+    0
 }
 
 fn pretty(possible_pw: Option<c_passwd>) {

kill/kill.rs

@@ -97,7 +97,7 @@ pub fn uumain(args: Vec<String>) -> int {
         Version => version(),
     }
 
-    return 0;
+    0
 }
 
 fn version() {
@@ -177,7 +177,7 @@ fn signal_by_name_or_value(signal_name_or_value: &str) -> Option<uint> {
             return Some(signal.value);
         }
     }
-    return None;
+    None
 }
 
 fn kill(signalname: &str, pids: std::vec::Vec<String>) {

logname/logname.rs

@@ -78,7 +78,7 @@ pub fn uumain(args: Vec<String>) -> int {
 
     exec();
 
-    return 0;
+    0
 }
 
 fn exec() {

md5sum/md5sum.rs

@@ -80,7 +80,7 @@ pub fn uumain(args: Vec<String>) -> int {
         }
     }
 
-    return 0;
+    0
 }
 
 fn md5sum(files: Vec<String>, binary: bool, check: bool, tag: bool, status: bool, quiet: bool, strict: bool, warn: bool) -> Result<(), int> {
@@ -150,7 +150,7 @@ fn md5sum(files: Vec<String>, binary: bool, check: bool, tag: bool, status: bool
         }
     }
 
-    return Ok(());
+    Ok(())
 }
 
 fn calc_sum(md5: &mut crypto::md5::Md5, file: &mut Reader, binary: bool) -> String {

mkdir/mkdir.rs

@@ -85,8 +85,8 @@ pub fn uumain(args: Vec<String>) -> int {
         crash!(1, "missing operand");
     }
     match exec(dirs, mk_parents, mode, verbose_flag) {
-        Ok(()) => return 0,
-        Err(e) => return e
+        Ok(()) => 0,
+        Err(e) => e
     }
 }
 
@@ -151,7 +151,7 @@ fn exec(dirs: Vec<String>, mk_parents: bool, mode: FilePermission, verbose: bool
         }
     }
 
-    return result;
+    result
 }
 
 /**