for x in xs.iter() -> for x in &xs

src/libcoretest/cmp.rs

@@ -66,11 +66,11 @@ fn test_partial_min() {
         (1.0f64, NAN, None)
     ];
 
-    for &(a, b, result) in data_integer.iter() {
+    for &(a, b, result) in &data_integer {
         assert!(partial_min(a, b) == result);
     }
 
-    for &(a, b, result) in data_float.iter() {
+    for &(a, b, result) in &data_float {
         assert!(partial_min(a, b) == result);
     }
 }
@@ -99,11 +99,11 @@ fn test_partial_max() {
         (1.0f64, NAN, None)
     ];
 
-    for &(a, b, result) in data_integer.iter() {
+    for &(a, b, result) in &data_integer {
         assert!(partial_max(a, b) == result);
     }
 
-    for &(a, b, result) in data_float.iter() {
+    for &(a, b, result) in &data_float {
         assert!(partial_max(a, b) == result);
     }
 }

src/libcoretest/hash/mod.rs

@@ -25,7 +25,7 @@ impl Default for MyHasher {
 impl Writer for MyHasher {
     // Most things we'll just add up the bytes.
     fn write(&mut self, buf: &[u8]) {
-        for byte in buf.iter() {
+        for byte in buf {
             self.hash += *byte as u64;
         }
     }

src/libcoretest/hash/sip.rs

@@ -109,7 +109,7 @@ fn test_siphash() {
 
     fn to_hex_str(r: &[u8; 8]) -> String {
         let mut s = String::new();
-        for b in r.iter() {
+        for b in r {
             s.push_str(format!("{}", fmt::radix(*b, 16)).as_slice());
         }
         s
@@ -130,7 +130,7 @@ fn test_siphash() {
     fn result_str(h: u64) -> String {
         let r = result_bytes(h);
         let mut s = String::new();
-        for b in r.iter() {
+        for b in &r {
             s.push_str(format!("{}", fmt::radix(*b, 16)).as_slice());
         }
         s