4 files changed, 11 insertions, 10 deletions
diff --git a/activemodel/lib/active_model/errors.rb b/activemodel/lib/active_model/errors.rb
index 0cdb0e8525..45ef14013a 100644
--- a/activemodel/lib/active_model/errors.rb
+++ b/activemodel/lib/active_model/errors.rb
@@ -276,11 +276,11 @@ module ActiveModel
     #   person.errors.to_hash(true) # => {:name=>["name cannot be nil"]}
     def to_hash(full_messages = false)
       if full_messages
-        self.messages.each_with_object({}) do |(attribute, array), messages|
+        messages.each_with_object({}) do |(attribute, array), messages|
           messages[attribute] = array.map { |message| full_message(attribute, message) }
         end
       else
-        self.messages.dup
+        messages.dup
       end
     end
 
@@ -439,7 +439,8 @@ module ActiveModel
       return message if attribute == :base
       attr_name = attribute.to_s.tr(".", "_").humanize
       attr_name = @base.class.human_attribute_name(attribute, default: attr_name)
-      I18n.t(:"errors.format",         default:  "%{attribute} %{message}",
+      I18n.t(:"errors.format",
+        default:  "%{attribute} %{message}",
         attribute: attr_name,
         message:   message)
     end
diff --git a/activemodel/lib/active_model/translation.rb b/activemodel/lib/active_model/translation.rb
index 75509b0588..b8cf43cc10 100644
--- a/activemodel/lib/active_model/translation.rb
+++ b/activemodel/lib/active_model/translation.rb
@@ -30,7 +30,7 @@ module ActiveModel
     # ActiveModel::Errors#full_messages and
     # ActiveModel::Translation#human_attribute_name.
     def lookup_ancestors
-      self.ancestors.select { |x| x.respond_to?(:model_name) }
+      ancestors.select { |x| x.respond_to?(:model_name) }
     end
 
     # Transforms attribute names into a more human format, such as "First name"
diff --git a/activemodel/lib/active_model/type/integer.rb b/activemodel/lib/active_model/type/integer.rb
index b76e9d96f6..41dd655a5c 100644
--- a/activemodel/lib/active_model/type/integer.rb
+++ b/activemodel/lib/active_model/type/integer.rb
@@ -59,7 +59,7 @@ module ActiveModel
         end
 
         def _limit
-          self.limit || DEFAULT_LIMIT
+          limit || DEFAULT_LIMIT
         end
     end
   end
diff --git a/activemodel/lib/active_model/validations/clusivity.rb b/activemodel/lib/active_model/validations/clusivity.rb
index a869dba672..18f1056e2b 100644
--- a/activemodel/lib/active_model/validations/clusivity.rb
+++ b/activemodel/lib/active_model/validations/clusivity.rb
@@ -17,11 +17,11 @@ module ActiveModel
       def include?(record, value)
         members = if delimiter.respond_to?(:call)
           delimiter.call(record)
-                  elsif delimiter.respond_to?(:to_sym)
-                    record.send(delimiter)
-                  else
-                    delimiter
-                  end
+        elsif delimiter.respond_to?(:to_sym)
+          record.send(delimiter)
+        else
+          delimiter
+        end
 
         members.send(inclusion_method(members), value)
       end