update docs

Signed-off-by: NAnnie_wang <annie.wangli@huawei.com>

en/application-dev/reference/apis/js-apis-filemanager.md

@@ -22,6 +22,7 @@ Obtains information about the root album or directory in asynchronous mode. This
 **System capability**: SystemCapability.FileManagement.UserFileService
 
 **Parameters**
+
 | Name| Type| Mandatory| Description|
 | --- | --- | --- | -- |
 | options | Object | No| The options are as follows:<br>- &nbsp;**dev**: See [DevInfo](#devinfo). It is **dev = {name: "local"}** by default if not specified. Currently, only 'local' is supported.|
@@ -83,6 +84,7 @@ Obtains information about the second-level album or files in asynchronous mode.
 **System capability**: SystemCapability.FileManagement.UserFileService
 
 **Parameters**
+
 | Name| Type| Mandatory| Description|
 | --- | --- | --- | -- |
 | path | string | Yes| URI of the directory to query.|
@@ -169,6 +171,7 @@ Creates a file in the specified path in asynchronous mode. This API uses a promi
 **System capability**: SystemCapability.FileManagement.UserFileService
 
 **Parameters**
+
 | Name| Type| Mandatory| Description|
 | --- | --- | --- | -- |
 | filename | string | Yes| Name of the file to create.|

en/application-dev/reference/apis/js-apis-statfs.md

@@ -18,26 +18,26 @@ Obtains the number of free bytes of the specified file system in asynchronous mo
 
 **System capability**: SystemCapability.FileManagement.File.FileIO
 
-- **Parameters**
+**Parameters**
 
   | Name| Type  | Mandatory| Description                        |
   | ------ | ------ | ---- | ---------------------------- |
   | path   | string | Yes  | File path of the file system.|
 
-- Return value
+**Return value**
 
   | Type                 | Description          |
   | --------------------- | -------------- |
   | Promise<number> | Promise used to return the number of free bytes obtained.|
 
-- Example
+**Example**
 
   ```js
   let path = "/dev";
-  statfs.getFreeBytes(path).then(function (number){
-      console.info("getFreeBytes promise successfully:"+ number);
-  }).catch(function(err){
-      console.info("getFreeBytes failed with error:"+ err);
+  statfs.getFreeBytes(path).then(function (number) {
+      console.info("getFreeBytes promise successfully:" + number);
+  }).catch(function (err) {
+      console.info("getFreeBytes failed with error:" + err);
   });
   ```
 
@@ -49,21 +49,21 @@ Obtains the number of free bytes of the specified file system in asynchronous mo
 
 **System capability**: SystemCapability.FileManagement.File.FileIO
 
-- **Parameters**
+**Parameters**
 
   | Name  | Type                       | Mandatory| Description                        |
   | -------- | --------------------------- | ---- | ---------------------------- |
   | path     | string                      | Yes  | File path of the file system.|
   | callback | AsyncCallback<number> | Yes  | Callback invoked to return the number of free bytes obtained.|
 
-- Example
+**Example**
 
   ```js
-   import featureAbility from '@ohos.ability.featureAbility';
+  import featureAbility from '@ohos.ability.featureAbility';
   let context = featureAbility.getContext();
   context.getFilesDir().then(function (path) {
-      statfs.getFreeBytes(path, function(err, number){
-          console.info("Got free bytes successfully:"+ number);
+      statfs.getFreeBytes(path, function (err, number) {
+          console.info("getFreeBytes callback successfully:" + number);
       });
   });
   ```
@@ -76,26 +76,26 @@ Obtains the total number of bytes of the specified file system in asynchronous m
 
 **System capability**: SystemCapability.FileManagement.File.FileIO
 
-- **Parameters**
+**Parameters**
 
   | Name| Type  | Mandatory| Description                        |
   | ---- | ------ | ---- | ---------------------------- |
   | path | string | Yes  | File path of the file system.|
 
-- Return value
+**Return value**
 
   | Type                 | Description        |
   | --------------------- | ------------ |
   | Promise<number> | Promise used to return the total number of bytes obtained.|
 
-- Example
+**Example**
 
   ```js
   let path = "/dev";
-  statfs.getTotalBytes(path).then(function (number){
-      console.info("getTotalBytes promise successfully:"+ number);
-  }).catch(function(err){
-      console.info("getTotalBytes failed with error:"+ err);
+  statfs.getTotalBytes(path).then(function (number) {
+      console.info("getTotalBytes promise successfully:" + number);
+  }).catch(function (err) {
+      console.info("getTotalBytes failed with error:" + err);
   });
   ```
 
@@ -107,21 +107,21 @@ Obtains the total number of bytes of the specified file system in asynchronous m
 
 **System capability**: SystemCapability.FileManagement.File.FileIO
 
-- **Parameters**
+**Parameters**
 
   | Name  | Type                       | Mandatory| Description                        |
   | -------- | --------------------------- | ---- | ---------------------------- |
   | path     | string                      | Yes  | File path of the file system.|
   | callback | AsyncCallback<number> | Yes  | Callback invoked to return the total number of bytes obtained.  |
 
-- Example
+**Example**
 
   ```js
   import featureAbility from '@ohos.ability.featureAbility';
   let context = featureAbility.getContext();
   context.getFilesDir().then(function (path) {
-      statfs.getTotalBytes(path, function(err, number){
-          console.info("Got total bytes successfully:"+ number);
+      statfs.getTotalBytes(path, function(err, number) {
+          console.info("getTotalBytes callback successfully:" + number);
       });
   });
   ```