Fix some typos (#3688)

Author: jdufresne

CHANGELOG.md

@@ -637,7 +637,7 @@
 - Fix Syntax Error in removal of new nested entity([#2539](https://github.com/railsadminteam/rails_admin/pull/2539))
 - Fix momentjs translations for '%-d' format day of the month([#2540](https://github.com/railsadminteam/rails_admin/pull/2540))
 - Fix Mongoid BSON object field ([#2495](https://github.com/railsadminteam/rails_admin/issues/2495))
-- Make browser ignore validaitons of removed nested child models([#2443](https://github.com/railsadminteam/rails_admin/issues/2443), [#2490](https://github.com/railsadminteam/rails_admin/pull/2490))
+- Make browser ignore validations of removed nested child models([#2443](https://github.com/railsadminteam/rails_admin/issues/2443), [#2490](https://github.com/railsadminteam/rails_admin/pull/2490))
 
 ## [0.8.1](https://github.com/railsadminteam/rails_admin/tree/v0.8.1) - 2015-11-24
 

spec/rails_admin/config/fields/types/paperclip_spec.rb

@@ -5,7 +5,7 @@
 RSpec.describe RailsAdmin::Config::Fields::Types::Paperclip do
   it_behaves_like 'a generic field type', :string_field, :paperclip
 
-  context 'when a *_file_name field exists but not decleared as has_attached_file' do
+  context 'when a *_file_name field exists but not declared as has_attached_file' do
     before do
       class PaperclipTest < Tableless
         column :some_file_name, :varchar

spec/rails_admin/config_spec.rb

@@ -294,7 +294,7 @@ class TestController < ActionController::Base; end
   describe '.parent_controller=' do
     context 'if RailsAdmin::ApplicationController is already loaded' do
       before do
-        # preload cotrollers (e.g. when config.eager_load = true)
+        # preload controllers (e.g. when config.eager_load = true)
         RailsAdmin::MainController
       end