Change spec description to be more accurate

spec/lib/gitlab/asciidoc/include_processor_spec.rb

@@ -35,7 +35,7 @@ describe Gitlab::Asciidoc::IncludeProcessor do
       expect(processor.send(:include_allowed?, 'foo.adoc', reader)).to be_truthy
     end
 
-    it 'allows the Nth + 1 include' do
+    it 'allows the Nth include' do
       (max_includes - 1).times { processor.send(:read_blob, ref, 'a.adoc') }
 
       expect(processor.send(:include_allowed?, 'foo.adoc', reader)).to be_truthy