diff --git a/docs/package_index_json-specification.md b/docs/package_index_json-specification.md
index b0077d79931..4d5293477aa 100644
--- a/docs/package_index_json-specification.md
+++ b/docs/package_index_json-specification.md
@@ -26,35 +26,35 @@ The root of the JSON index is an array of `packages`:
 ```json
 {
   "packages": [
-      PACKAGE_XXXX
-   ]
+    PACKAGE_XXXX
+  ]
 }
 ```
 
 3rd party vendors should use a single `PACKAGE_XXXX` that is a dictionary map with the vendor's metadata, a list of `PLATFORMS` and a list of `TOOLS`. For example:
 
 ```json
-{
-  "name": "arduino",
-  "maintainer": "Arduino LLC",
-  "websiteURL": "http://www.arduino.cc/",
-  "email": "packages@arduino.cc",
-
-  "platforms": [
-      PLATFORM_AVR,
-      PLATFORM_ARM,
-      PLATFORM_XXXXX,
-      PLATFORM_YYYYY,
-  ],
-
-  "tools": [
-      TOOLS_COMPILER_AVR,
-      TOOLS_UPLOADER_AVR,
-      TOOLS_COMPILER_ARM,
-      TOOLS_XXXXXXX,
-      TOOLS_YYYYYYY,
-   ],
-}
+    {
+      "name": "arduino",
+      "maintainer": "Arduino LLC",
+      "websiteURL": "http://www.arduino.cc/",
+      "email": "packages@arduino.cc",
+
+      "platforms": [
+        PLATFORM_AVR,
+        PLATFORM_ARM,
+        PLATFORM_XXXXX,
+        PLATFORM_YYYYY,
+      ],
+
+      "tools": [
+        TOOLS_COMPILER_AVR,
+        TOOLS_UPLOADER_AVR,
+        TOOLS_COMPILER_ARM,
+        TOOLS_XXXXXXX,
+        TOOLS_YYYYYYY,
+      ],
+    }
 ```
 
 The metadata fields are: