Trailing whitespace cleanup from files in the Code directory.

Used the following command from within the Code dir:
git ls-files *.m *.h *.json | xargs /usr/bin/sed -i '' -E 's/[[:space:]]*$//'

Code/Search/RKManagedObjectStore+RKSearchAdditions.m

@@ -36,9 +36,9 @@ static char searchIndexerAssociationKey;
 - (void)addSearchIndexingToEntityForName:(NSString *)entityName onAttributes:(NSArray *)attributes
 {
     NSAssert(! self.persistentStoreCoordinator, @"Add indexing to your entities before adding persistent stores. The managed object model must be mutable to add indexing.");
-    
+
     if (! self.searchIndexer) [self createSearchIndexer];
-    
+
     NSEntityDescription *entity = [[self.managedObjectModel entitiesByName] objectForKey:entityName];
     [RKSearchIndexer addSearchIndexingToEntity:entity onAttributes:attributes];
 }