whitespace changes

Author: Sam Kleinman

source/tutorial/aggregation-examples.txt

@@ -75,10 +75,10 @@ the following aggregation operation:
 
 .. code-block:: javascript
 
-   db.zipcodes.aggregate({ $group :
-                           { _id : "$state",
-                             totalPop : { $sum : "$pop" } } },
-                         { $match : {totalPop : { $gte : 10*1000*1000 } } } )
+   db.zipcodes.aggregate( { $group :
+                            { _id : "$state",
+                              totalPop : { $sum : "$pop" } } },
+                          { $match : {totalPop : { $gte : 10*1000*1000 } } } )
 
 Aggregations operations using the :method:`aggregate()
 <db.collection.aggregate()>` helper, process all documents on the
@@ -133,10 +133,10 @@ following aggregation operation:
 
 .. code-block:: javascript
 
-   db.zipcodes.aggregate({ $group :
-                          { _id : { state : "$state", city : "$city" },
-                            pop : { $sum : "$pop" } } },
-                        { $group :
+   db.zipcodes.aggregate( { $group :
+                            { _id : { state : "$state", city : "$city" },
+                              pop : { $sum : "$pop" } } },
+                          { $group :
                           { _id : "$_id.state",
                             avgCityPop : { $avg : "$pop" } } } )
 
@@ -194,25 +194,25 @@ state, use the following aggregation operation:
 
 .. code-block:: javascript
 
-   db.zipcodes.aggregate({ $group:
-                           { _id: { state: "$state", city: "$city" },
-                             pop: { $sum: "$pop" } } },
-                         { $sort: { pop: 1 } },
-                         { $group:
-                           { _id : "$_id.state",
-                             biggestCity:  { $last: "$_id.city" },
-                             biggestPop:   { $last: "$pop" },
-                             smallestCity: { $first: "$_id.city" },
-                             smallestPop:  { $first: "$pop" } } },
-
-                         // the following $project is optional, and
-                         // modifies the output format.
-
-                         { $project:
-                           { _id: 0,
-                             state: "$_id",
-                             biggestCity:  { name: "$biggestCity",  pop: "$biggestPop" },
-                             smallestCity: { name: "$smallestCity", pop: "$smallestPop" } } } )
+   db.zipcodes.aggregate( { $group:
+                            { _id: { state: "$state", city: "$city" },
+                              pop: { $sum: "$pop" } } },
+                          { $sort: { pop: 1 } },
+                          { $group:
+                            { _id : "$_id.state",
+                              biggestCity:  { $last: "$_id.city" },
+                              biggestPop:   { $last: "$pop" },
+                              smallestCity: { $first: "$_id.city" },
+                              smallestPop:  { $first: "$pop" } } },
+
+                          // the following $project is optional, and
+                          // modifies the output format.
+
+                          { $project:
+                            { _id: 0,
+                              state: "$_id",
+                              biggestCity:  { name: "$biggestCity",  pop: "$biggestPop" },
+                              smallestCity: { name: "$smallestCity", pop: "$smallestPop" } } } )
 
 Aggregations operations using the :method:`aggregate()
 <db.collection.aggregate()>` helper, process all documents on the