Remove unnecessary parentheses.

src/test/bench/shootout-chameneos-redux.rs

@@ -34,7 +34,7 @@ struct CreatureInfo {
 }
 
 fn show_color(cc: color) -> ~str {
-    match (cc) {
+    match cc {
         Red    => {~"red"}
         Yellow => {~"yellow"}
         Blue   => {~"blue"}
@@ -51,7 +51,7 @@ fn show_color_list(set: ~[color]) -> ~str {
 }
 
 fn show_digit(nn: uint) -> ~str {
-    match (nn) {
+    match nn {
         0 => {~"zero"}
         1 => {~"one"}
         2 => {~"two"}

src/test/bench/shootout-threadring.rs

@@ -37,7 +37,7 @@ fn start(n_tasks: int, token: int) {
 }
 
 fn roundtrip(id: int, n_tasks: int, p: &Port<int>, ch: &Chan<int>) {
-    while (true) {
+    loop {
         match p.recv() {
           1 => {
             println!("{}\n", id);

src/test/bench/sudoku.rs

@@ -110,7 +110,7 @@ impl Sudoku {
 
         let mut ptr = 0u;
         let end = work.len();
-        while (ptr < end) {
+        while ptr < end {
             let (row, col) = work[ptr];
             // is there another color to try?
             if self.next_color(row, col, self.grid[row][col] + (1 as u8)) {