Merge pull request #1183 from rails-api/block_style

Update Rubocop todo

lib/active_model/serializer/adapter.rb

@@ -58,12 +58,12 @@ module ActiveModel
           return adapter if adapter.is_a?(Class)
           adapter_name = adapter.to_s.underscore
           # 2. return if registered
-          adapter_map.fetch(adapter_name) {
+          adapter_map.fetch(adapter_name) do
             # 3. try to find adapter class from environment
             adapter_class = find_by_name(adapter_name)
             register(adapter_name, adapter_class)
             adapter_class
-          }
+          end
         rescue NameError, ArgumentError => e
           failure_message =
             "NameError: #{e.message}. Unknown adapter: #{adapter.inspect}. Valid adapters are: #{adapters}"

lib/active_model/serializer/array_serializer.rb

@@ -11,9 +11,9 @@ module ActiveModel
         @root = options[:root]
         @object = resources
         @serializers = resources.map do |resource|
-          serializer_class = options.fetch(:serializer) {
+          serializer_class = options.fetch(:serializer) do
             ActiveModel::Serializer.serializer_for(resource)
-          }
+          end
 
           if serializer_class.nil?
             fail NoSerializerError, "No serializer found for resource: #{resource.inspect}"

lib/active_model/serializer/include_tree.rb

@@ -16,9 +16,9 @@ module ActiveModel
           when Symbol
             { included => {} }
           when Hash
-            included.each_with_object({}) { |(key, value), hash|
+            included.each_with_object({}) do |(key, value), hash|
               hash[key] = include_args_to_hash(value)
-            }
+            end
           when Array
             included.reduce({}) { |a, e| a.merge!(include_args_to_hash(e)) }
           when String