Add CHANGELOG entry. Fix rubocop issue

CHANGELOG.md

@@ -16,6 +16,10 @@ To install release candidates run `[sudo] gem install cocoapods --pre`
   [yanzhiwei147](https://github.com/yanzhiwei147)
   [#5510](https://github.com/CocoaPods/CocoaPods/pull/5510)
 
+* Add support for messages applications
+  [benasher44](https://github.com/benasher44)
+  [#5726](https://github.com/CocoaPods/CocoaPods/pull/5726)
+
 ##### Bug Fixes
 
 * Hash scope suffixes if they are over 50 characters to prevent file paths from being too long. 

spec/unit/installer/user_project_integrator/target_integrator_spec.rb

@@ -172,7 +172,7 @@ module Pod
           phase = target.shell_script_build_phases.find { |bp| bp.name == @embed_framework_phase_name }
           phase.nil?.should == false
         end
-        
+
         it 'does not add an embed frameworks build phase if the target to integrate is a messages extension for an iOS app' do
           @pod_bundle.stubs(:requires_frameworks? => true)
           target = @target_integrator.send(:native_targets).first