Rollup merge of rust-lang#29068 - apasel422:tidy, r=alexcrichton

r? @alexcrichton

Author: Manishearth

src/libstd/io/impls.rs

@@ -238,7 +238,7 @@ mod tests {
 
         b.iter(|| {
             let mut rd = &buf[..];
-            for _ in (0 .. 8) {
+            for _ in 0..8 {
                 let _ = rd.read(&mut dst);
                 test::black_box(&dst);
             }
@@ -252,7 +252,7 @@ mod tests {
 
         b.iter(|| {
             let mut wr = &mut buf[..];
-            for _ in (0 .. 8) {
+            for _ in 0..8 {
                 let _ = wr.write_all(&src);
                 test::black_box(&wr);
             }
@@ -266,7 +266,7 @@ mod tests {
 
         b.iter(|| {
             let mut rd = &buf[..];
-            for _ in (0 .. 8) {
+            for _ in 0..8 {
                 let _ = rd.read(&mut dst);
                 test::black_box(&dst);
             }
@@ -280,7 +280,7 @@ mod tests {
 
         b.iter(|| {
             let mut wr = &mut buf[..];
-            for _ in (0 .. 8) {
+            for _ in 0..8 {
                 let _ = wr.write_all(&src);
                 test::black_box(&wr);
             }

src/libstd/sys/unix/os.rs

@@ -343,7 +343,7 @@ pub fn args() -> Args {
         let args = objc_msgSend(info, arguments_sel);
 
         let cnt: usize = mem::transmute(objc_msgSend(args, count_sel));
-        for i in (0..cnt) {
+        for i in 0..cnt {
             let tmp = objc_msgSend(args, object_at_sel, i);
             let utf_c_str: *const libc::c_char =
                 mem::transmute(objc_msgSend(tmp, utf8_sel));

src/test/bench/shootout-nbody.rs

@@ -225,7 +225,7 @@ fn main() {
     offset_momentum(&mut bodies);
     println!("{:.9}", energy(&bodies));
 
-    for _ in (0..n) {
+    for _ in 0..n {
         advance(&mut bodies, 0.01, &mut diff, &mut mag);
     }