Fixed errors in libstd.

Author: ivanbakel

src/libcore/tests/slice.rs

@@ -105,27 +105,27 @@ fn test_chunks_last() {
 
 #[test]
 fn test_chunks_mut_count() {
-    let mut v: &mut [i32] = &mut [0, 1, 2, 3, 4, 5];
+    let v: &mut [i32] = &mut [0, 1, 2, 3, 4, 5];
     let c = v.chunks_mut(3);
     assert_eq!(c.count(), 2);
 
-    let mut v2: &mut [i32] = &mut [0, 1, 2, 3, 4];
+    let v2: &mut [i32] = &mut [0, 1, 2, 3, 4];
     let c2 = v2.chunks_mut(2);
     assert_eq!(c2.count(), 3);
 
-    let mut v3: &mut [i32] = &mut [];
+    let v3: &mut [i32] = &mut [];
     let c3 = v3.chunks_mut(2);
     assert_eq!(c3.count(), 0);
 }
 
 #[test]
 fn test_chunks_mut_nth() {
-    let mut v: &mut [i32] = &mut [0, 1, 2, 3, 4, 5];
+    let v: &mut [i32] = &mut [0, 1, 2, 3, 4, 5];
     let mut c = v.chunks_mut(2);
     assert_eq!(c.nth(1).unwrap()[1], 3);
     assert_eq!(c.next().unwrap()[0], 4);
 
-    let mut v2: &mut [i32] = &mut [0, 1, 2, 3, 4];
+    let v2: &mut [i32] = &mut [0, 1, 2, 3, 4];
     let mut c2 = v2.chunks_mut(3);
     assert_eq!(c2.nth(1).unwrap()[1], 4);
     assert_eq!(c2.next(), None);
@@ -194,7 +194,7 @@ fn get_range() {
 
 #[test]
 fn get_mut_range() {
-    let mut v: &mut [i32] = &mut [0, 1, 2, 3, 4, 5];
+    let v: &mut [i32] = &mut [0, 1, 2, 3, 4, 5];
     assert_eq!(v.get_mut(..), Some(&mut [0, 1, 2, 3, 4, 5][..]));
     assert_eq!(v.get_mut(..2), Some(&mut [0, 1][..]));
     assert_eq!(v.get_mut(2..), Some(&mut [2, 3, 4, 5][..]));

src/libstd/error.rs

@@ -514,7 +514,7 @@ mod tests {
     #[test]
     fn downcasting() {
         let mut a = A;
-        let mut a = &mut a as &mut (Error + 'static);
+        let a = &mut a as &mut (Error + 'static);
         assert_eq!(a.downcast_ref::<A>(), Some(&A));
         assert_eq!(a.downcast_ref::<B>(), None);
         assert_eq!(a.downcast_mut::<A>(), Some(&mut A));

src/libstd/io/cursor.rs

@@ -456,7 +456,7 @@ mod tests {
     #[test]
     fn test_slice_reader() {
         let in_buf = vec![0, 1, 2, 3, 4, 5, 6, 7];
-        let mut reader = &mut &in_buf[..];
+        let reader = &mut &in_buf[..];
         let mut buf = [];
         assert_eq!(reader.read(&mut buf).unwrap(), 0);
         let mut buf = [0];