fix: JSON formatting in erratum for example 102

Author: evanp

ERRATA.md

@@ -25,7 +25,7 @@ This document includes errata for the [Activity Streams](https://www.w3.org/TR/a
     are only allowed on `Link` objects. One alternative is to use `Link` objects
     with the correct `height` and `width` as the `url` property for each `Image`
     object.
-    
+
     ```json
     {
       "@context": "https://www.w3.org/ns/activitystreams",
@@ -60,14 +60,14 @@ This document includes errata for the [Activity Streams](https://www.w3.org/TR/a
   - The range of the `units` property is given as an enumerated set of values.
     Due to a formatting error, some of these values are shown with an incorrect
     leading space character. The correct range is:
-    
+
     ```text
     "cm" | "feet" | "inches" | "km" | "m" | "miles" | xsd:anyURI
     ```
 
   - Example 58 includes a `summary` property on a `Mention` object, which is
     not allowed. A corrected example:
-    
+
     ```json
     {
       "@context": "https://www.w3.org/ns/activitystreams",
@@ -129,24 +129,24 @@ This document includes errata for the [Activity Streams](https://www.w3.org/TR/a
       }
     }
     ```
- 
+
   - Example 102 is missing a `type` property on the `Link` value of the `url` property. For clarity, the example should read:
 
-  ```json
-  {
-  "@context": "https://www.w3.org/ns/activitystreams",
-  "type": "Video",
-  "name": "Cool New Movie",
-  "duration": "PT2H30M",
-  "preview": {
-    "type": "Video",
-    "name": "Trailer",
-    "duration": "PT1M",
-    "url": {
-      "type": "Link",
-      "href": "http://example.org/trailer.mkv",
-      "mediaType": "video/mkv"
+    ```json
+    {
+      "@context": "https://www.w3.org/ns/activitystreams",
+      "type": "Video",
+      "name": "Cool New Movie",
+      "duration": "PT2H30M",
+      "preview": {
+        "type": "Video",
+        "name": "Trailer",
+        "duration": "PT1M",
+        "url": {
+          "type": "Link",
+          "href": "http://example.org/trailer.mkv",
+          "mediaType": "video/mkv"
+        }
+      }
     }
-  }
-}
-```
+    ```