code gardening: removes redundant selfs

A few have been left for aesthetic reasons, but have made a pass
and removed most of them.

Note that if the method `foo` returns an array, `foo << 1`
is a regular push, nothing to do with assignments, so
no self required.

1 files changed, 2 insertions, 2 deletions

diff --git a/activemodel/lib/active_model/errors.rb b/activemodel/lib/active_model/errors.rb
index 0cdb0e8525..b6ab7ab6b0 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