content: fix code indents

Change-Id: If4931701d111fad6228724c9307dc8ffd5ec646c
Reviewed-on: https://go-review.googlesource.com/c/blog/+/253098
Reviewed-by: Alberto Donizetti <alb.donizetti@gmail.com>
Reviewed-by: Emmanuel Odeke <emm.odeke@gmail.com>
diff --git a/content/json.article b/content/json.article
index bedeba6..d6a1c9b 100644
--- a/content/json.article
+++ b/content/json.article
@@ -216,8 +216,8 @@
 	    Parents []string
 	}
 
-	    var m FamilyMember
-	    err := json.Unmarshal(b, &m)
+	var m FamilyMember
+	err := json.Unmarshal(b, &m)
 
 Unmarshaling that data into a `FamilyMember` value works as expected,
 but if we look closely we can see a remarkable thing has happened.