add Apache lisence and fix the borrowed expression implements error

Author: bytelazy

core/src/layers/sanity_check.rs

@@ -1,3 +1,20 @@
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 use crate::raw::*;
 use crate::{Error, ErrorKind, Result};
 
@@ -71,7 +88,7 @@ impl<L: oio::List> oio::List for SanityCheckLister<L> {
                 if !p.starts_with(&self.prefix) {
                     return Err(Error::new(
                         ErrorKind::Unexpected,
-                        &format!(
+                        format!(
                             "sanity check failed: entry {} is outside prefix {}",
                             p, self.prefix
                         ),