Better fix for rust nightly

Author: tailhook

src/lib.rs

@@ -1125,10 +1125,10 @@ mod test {
         }
         let etext = parse_utf(b"a\x80\x80", "/etc").unwrap_err().to_string();
         assert!(etext.starts_with(
-            "Path error at \"/etc\": invalid utf-8: invalid "));
+            "Path error at \"/etc\": invalid utf-8"));
         let etext = parse_utf(b"\x80\x80", PathBuf::from("/tmp")).unwrap_err()
             .to_string();
         assert!(etext.starts_with(
-            "Path error at \"/tmp\": invalid utf-8: invalid "));
+            "Path error at \"/tmp\": invalid utf-8"));
     }
 }