Fix spec

spec/lib/banzai/filter/html_entity_filter_spec.rb

@@ -3,7 +3,7 @@ require 'spec_helper'
 describe Banzai::Filter::HtmlEntityFilter do
   include FilterSpecHelper
-  let(:unescaped) { 'foo <strike attr="foo">&&amp;</strike>' }
+  let(:unescaped) { 'foo <strike attr="foo">&&amp;&</strike>' }
   let(:escaped) { 'foo &lt;strike attr=&quot;foo&quot;&gt;&amp;&amp;amp;&amp;&lt;/strike&gt;' }
   it 'converts common entities to their HTML-escaped equivalents' do