remove spaces inside parentheses

Author: huaxingao

docs/sql-ref-syntax-dml-load.md

@@ -20,7 +20,7 @@ license: |
 ---
 
 ### Description
-`LOAD DATA` statement loads the data into a table from the user specified directory or file. If a directory is specified then all the files from the directory are loaded. If a file is specified then only the single file is loaded. Additionally the `LOAD DATA` statement takes an optional partition specification. When a partition is specified, the data files ( when input source is a directory ) or the single file ( when input source is a file ) are loaded into the partition of the target table.
+`LOAD DATA` statement loads the data into a table from the user specified directory or file. If a directory is specified then all the files from the directory are loaded. If a file is specified then only the single file is loaded. Additionally the `LOAD DATA` statement takes an optional partition specification. When a partition is specified, the data files (when input source is a directory) or the single file (when input source is a file) are loaded into the partition of the target table.
 
 ### Syntax
 {% highlight sql %}