Fix an endless loop in the tests.

tests/ui/implicit_return.rs

@@ -55,10 +55,10 @@ fn test_loop_with_block() -> bool {
 fn test_loop_with_nests() -> bool {
     loop {
         if true {
-            let _ = true;
+            break true;
         }
         else {
-            break true;
+            let _ = true;
         }
     }
 }

tests/ui/implicit_return.stderr

@@ -43,9 +43,9 @@ error: missing return statement
    |             ^^^^^^^^^^ help: change `break` to `return` as shown: `return true`
 
 error: missing return statement
-  --> $DIR/implicit_return.rs:61:13
+  --> $DIR/implicit_return.rs:58:13
    |
-61 |             break true;
+58 |             break true;
    |             ^^^^^^^^^^ help: change `break` to `return` as shown: `return true`
 
 error: missing return statement