clean tests/ui/neg_multiply.rs

Cleaning the empty lines for clarity.

tests/ui/neg_multiply.rs

@@ -29,10 +29,8 @@ fn main() {
 
     x * -1;
 
-
     -1 * x;
 
-
     -1 * -1; // should be ok
 
     X * -1; // should be ok

tests/ui/neg_multiply.stderr

@@ -11,9 +11,9 @@ note: lint level defined here
    |         ^^^^^^^^^^^^
 
 error: Negation by multiplying with -1
-  --> $DIR/neg_multiply.rs:33:5
+  --> $DIR/neg_multiply.rs:32:5
    |
-33 |     -1 * x;
+32 |     -1 * x;
    |     ^^^^^^
 
 error: aborting due to 2 previous errors