flipped condition oops

Author: workingjubilee

library/std/src/sys_common/wtf8/tests.rs

@@ -745,7 +745,7 @@ fn wobbled_wtf8_plus_str_isnt_utf8() {
 #[test]
 fn unwobbly_wtf8_plus_utf8_is_utf8() {
     let mut string: Wtf8Buf = Wtf8Buf::from_str("hello world");
-    assert!(!string.is_known_utf8);
+    assert!(string.is_known_utf8);
     string.push_str("some utf-8");
-    assert!(!string.is_known_utf8);
+    assert!(string.is_known_utf8);
 }