tests: update needless_bool test stderr

I'm getting a test failure otherwise with rust master (f688ba6089).
2019-05-23 17:03:59 +02:00 · 2019-05-23 17:03:59 +02:00 · 3d0795bb04
commit 3d0795bb04
parent 39d1fea6d6
1 changed files with 1 additions and 1 deletions
--- a/tests/ui/needless_bool.stderr
+++ b/tests/ui/needless_bool.stderr
@ -145,7 +145,7 @@ LL | |         false
 LL | |     } else {
 LL | |         true
 LL | |     };
-   | |_____^ help: you can reduce it to: `{ !returns_bool() }`
+   | |_____^ help: you can reduce it to: `!returns_bool()`

 error: aborting due to 16 previous errors