re: RuboCop: Bulk minor style corrections

lib/action_controller/serialization.rb

@@ -19,12 +19,13 @@ module ActionController
     end
 
     def serialization_scope
-      send(_serialization_scope) if _serialization_scope &&
-        respond_to?(_serialization_scope, true)
+      return unless _serialization_scope && respond_to?(_serialization_scope, true)
+
+      send(_serialization_scope)
     end
 
     def get_serializer(resource, options = {})
-      if !use_adapter?
+      unless use_adapter?
         warn 'ActionController::Serialization#use_adapter? has been removed. '\
           "Please pass 'adapter: false' or see ActiveSupport::SerializableResource.new"
         options[:adapter] = false

lib/active_model/serializer.rb

@@ -125,10 +125,9 @@ module ActiveModel
       self.root = instance_options[:root]
       self.scope = instance_options[:scope]
 
-      scope_name = instance_options[:scope_name]
-      if scope_name && !respond_to?(scope_name)
-        define_singleton_method scope_name, lambda { scope }
-      end
+      return if !(scope_name = instance_options[:scope_name]) || respond_to?(scope_name)
+
+      define_singleton_method scope_name, -> { scope }
     end
 
     def success?

lib/active_model_serializers/deprecate.rb

@@ -36,7 +36,7 @@ module ActiveModelSerializers
           target = is_a?(Module) ? "#{self}." : "#{self.class}#"
           msg = ["NOTE: #{target}#{name} is deprecated",
                  replacement == :none ? ' with no replacement' : "; use #{replacement} instead",
-                 "\n#{target}#{name} called from #{ActiveModelSerializers.location_of_caller.join(":")}"]
+                 "\n#{target}#{name} called from #{ActiveModelSerializers.location_of_caller.join(':')}"]
           warn "#{msg.join}."
           send old, *args, &block
         end

lib/active_model_serializers/model.rb

@@ -21,7 +21,7 @@ module ActiveModelSerializers
 
     # Defaults to the downcased model name and updated_at
     def cache_key
-      attributes.fetch(:cache_key) { "#{self.class.name.downcase}/#{id}-#{updated_at.strftime("%Y%m%d%H%M%S%9N")}" }
+      attributes.fetch(:cache_key) { "#{self.class.name.downcase}/#{id}-#{updated_at.strftime('%Y%m%d%H%M%S%9N')}" }
     end
 
     # Defaults to the time the serializer file was modified.