fixes formatting errors

Author: ahmarsuhail

hadoop-tools/hadoop-aws/src/site/markdown/tools/hadoop-aws/prefetching.md

@@ -1,3 +1,17 @@
+<!---
+  Licensed 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. See accompanying LICENSE file.
+-->
+
 # S3A Prefetching
 
 
@@ -15,11 +29,11 @@ With prefetching, we divide the file into blocks of a fixed size (default is 8MB
 
 ### Configuring the stream
 
-|Property	|Meaning	|Default	|
+|Property    |Meaning    |Default    |
 |---	|---	|---	|
-|fs.s3a.prefetch.enabled	|Enable the prefetch input stream	|TRUE |
-|fs.s3a.prefetch.block.size	|Size of a block	|8MB	|
-|fs.s3a.prefetch.block.count	|Number of blocks to prefetch	|8	|
+|fs.s3a.prefetch.enabled    |Enable the prefetch input stream    |TRUE |
+|fs.s3a.prefetch.block.size    |Size of a block    |8MB    |
+|fs.s3a.prefetch.block.count    |Number of blocks to prefetch    |8    |
 
 ### Key Components: