output safety rubocop issues

output.sh

$ rails c
Loading development environment (Rails 4.2.7.1)
irb(main):001:0> include ActionView::Helpers::OutputSafetyHelper
=> Object
irb(main):002:0> raw "foo"
=> "foo"
irb(main):003:0> thing = raw "foo"
=> "foo"
irb(main):004:0> thing.class
=> ActiveSupport::SafeBuffer
irb(main):005:0> result = thing + thing                                                                      
=> "foofoo"
irb(main):006:0> result.class
=> ActiveSupport::SafeBuffer
irb(main):007:0> result = thing + "bar"
=> "foobar"
irb(main):008:0> result.class
=> ActiveSupport::SafeBuffer
irb(main):009:0> result = thing + "<p>bar</p>"                                                               
=> "foo&lt;p&gt;bar&lt;/p&gt;"
irb(main):010:0> result.class
=> ActiveSupport::SafeBuffer
irb(main):011:0> result
=> "foo&lt;p&gt;bar&lt;/p&gt;"
irb(main):012:0> safe_join([raw("foo"), "<p>bar</p>".html_safe])
=> "foo<p>bar</p>"
irb(main):013:0> result = safe_join([raw("foo"), "<p>bar</p>".html_safe])                                    
=> "foo<p>bar</p>"
irb(main):014:0> result.class
=> ActiveSupport::SafeBuffer
irb(main):015:0> result.to_s
=> "foo<p>bar</p>"
irb(main):016:0> result = safe_join([raw("foo"), "<p>bar</p>".html_safe]) # rubocop:disable OutputSaftey^C
irb(main):016:0> result = thing.safe_concat "<p>bar</p>"                                                     
=> "foo<p>bar</p>"
irb(main):017:0> result = thing + "<p>bar</p>"
=> "foo<p>bar</p>&lt;p&gt;bar&lt;/p&gt;"
irb(main):018:0> result = thing.safe_concat "<p>bar</p>"                                                     
=> "foo<p>bar</p><p>bar</p>"
irb(main):019:0> safe_join
safe_join
irb(main):019:0>