format http sample code.

Signed-off-by: Nclevercong <lichunlin2@huawei.com>

zh-cn/application-dev/reference/apis/js-apis-http.md

@@ -143,14 +143,14 @@ httpRequest.request("EXAMPLE_URL",
     },
     readTimeout: 60000,
     connectTimeout: 60000
-},(err, data) => {
+}, (err, data) => {
     if (!err) {
         console.info('Result:' + data.result);
         console.info('code:' + data.responseCode);
         console.info('header:' + data.header);
         console.info('cookies:' + data.cookies); // 8+
-	console.info('header['Content-Type']:' + data.header['Content-Type']);
-	console.info('header['Status-Line']:' + data.header['Status-Line']);
+        console.info('header.Content-Type:' + data.header['Content-Type']);
+        console.info('header.Status-Line:' + data.header['Status-Line']);
         console.info('header.Date:' + data.header.Date);
         console.info('header.Server:' + data.header.Server);
     } else {
@@ -200,8 +200,8 @@ promise.then((value) => {
     console.info('code:' + value.responseCode);
     console.info('header:' + value.header);
     console.info('cookies:' + value.cookies); // 8+
-	console.info('header['Content-Type']:' + value.header['Content-Type']);
-	console.info('header['Status-Line']:' + value.header['Status-Line']);
+    console.info('header.Content-Type:' + value.header['Content-Type']);
+    console.info('header.Status-Line:' + value.header['Status-Line']);
     console.info('header.Date:' + value.header.Date);
     console.info('header.Server:' + value.header.Server);
 }).catch((err) => {