Update test expectations

Author: Manishearth

tests/ui/mut_mut.stderr

@@ -28,16 +28,16 @@ error: this expression mutably borrows a mutable reference. Consider reborrowing
    |                     ^^^^^^
 
 error: generally you want to avoid `&mut &mut _` if possible
-  --> $DIR/mut_mut.rs:30:17
+  --> $DIR/mut_mut.rs:30:33
    |
 30 |         let y : &mut &mut u32 = &mut &mut 2;
-   |                 ^^^^^^^^^^^^^
+   |                                 ^^^^^^^^^^^
 
 error: generally you want to avoid `&mut &mut _` if possible
-  --> $DIR/mut_mut.rs:30:33
+  --> $DIR/mut_mut.rs:30:17
    |
 30 |         let y : &mut &mut u32 = &mut &mut 2;
-   |                                 ^^^^^^^^^^^
+   |                 ^^^^^^^^^^^^^
 
 error: generally you want to avoid `&mut &mut _` if possible
   --> $DIR/mut_mut.rs:30:17
@@ -46,22 +46,22 @@ error: generally you want to avoid `&mut &mut _` if possible
    |                 ^^^^^^^^^^^^^
 
 error: generally you want to avoid `&mut &mut _` if possible
-  --> $DIR/mut_mut.rs:35:17
+  --> $DIR/mut_mut.rs:35:38
    |
 35 |         let y : &mut &mut &mut u32 = &mut &mut &mut 2;
-   |                 ^^^^^^^^^^^^^^^^^^
+   |                                      ^^^^^^^^^^^^^^^^
 
 error: generally you want to avoid `&mut &mut _` if possible
-  --> $DIR/mut_mut.rs:35:22
+  --> $DIR/mut_mut.rs:35:17
    |
 35 |         let y : &mut &mut &mut u32 = &mut &mut &mut 2;
-   |                      ^^^^^^^^^^^^^
+   |                 ^^^^^^^^^^^^^^^^^^
 
 error: generally you want to avoid `&mut &mut _` if possible
-  --> $DIR/mut_mut.rs:35:38
+  --> $DIR/mut_mut.rs:35:22
    |
 35 |         let y : &mut &mut &mut u32 = &mut &mut &mut 2;
-   |                                      ^^^^^^^^^^^^^^^^
+   |                      ^^^^^^^^^^^^^
 
 error: generally you want to avoid `&mut &mut _` if possible
   --> $DIR/mut_mut.rs:35:17