a little modify

diff --git a/doc/index.md b/doc/index.md
index 84e1905..9aecdc5 100644 (file)
--- a/doc/index.md
+++ b/doc/index.md
@@ -129,34 +129,34 @@ Transaction.SubmitResponse txs = Transaction.submit(client, singer);
 
 #### 1.createKey
 
-```java
-Key create(Client client, Builder builder);
-```
+    ```java
+    Key create(Client client, Builder builder);
+    ```
 
-##### Parameters
+    ##### Parameters
 
-- `Client` - *client*, Client object that makes requests to the core.
-- `Key.Builder` - *builder*, Builder object that builds request parameters.
+    - `Client` - *client*, Client object that makes requests to the core.
+    - `Key.Builder` - *builder*, Builder object that builds request parameters.
 
-##### Returns
+    ##### Returns
 
-- `Key` - *key*, Key object.
+    - `Key` - *key*, Key object.
 
 ----
 
 #### 2.listKeys
 
-```java
-List<Key> list(Client client);
-```
+    ```java
+    List<Key> list(Client client);
+    ```
 
-##### Parameters
+    ##### Parameters
 
-- `Client` - *client*, Client object that makes requests to the core.
+    - `Client` - *client*, Client object that makes requests to the core.
 
-##### Returns
+    ##### Returns
 
-- `List of Key`, *List<Key>*, an ArrayList object contains Key objects.
+    - `List of Key`, *List<Key>*, an ArrayList object contains Key objects.
 
 ----