fix spacing

Author: stephmarie17

source/aggregation.txt

@@ -219,7 +219,7 @@ This example creates pipeline stages to perform the following actions:
        {"_id"=>  {"$oid"=>  "..."}, "name"=>  "Salt & Pepper"}
        {"_id"=>  {"$oid"=>  "..."}, "name"=>  "Salt + Charcoal"}
        {"_id"=>  {"$oid"=>  "..."}, "name"=>  "A Salt & Battery"}
-       {"_id"=>  {"$oid"=> "..."}, "name"=>  "Salt And Fat"}
+       {"_id"=>  {"$oid"=> "..."},  "name"=>  "Salt And Fat"}
        {"_id"=>  {"$oid"=>  "..."}, "name"=>  "Salt And Pepper Diner"}
 
 Additional Information

source/includes/aggregation.rb

@@ -14,8 +14,8 @@
   pipeline = [
     { '$match' => { 'cuisine' => 'Bakery' } },
     { '$group' => {
-      '_id' => '$borough',
-      'count' => { '$sum' => 1 }
+        '_id' => '$borough',
+        'count' => { '$sum' => 1 }
       }
     }
   ]