Fixes not_to hound warnings

spec/features/admin/site_customization/documents_spec.rb

@@ -83,7 +83,7 @@ feature 'Documents' do
     end
 
     expect(page).to have_content "Document deleted succesfully"
-    expect(page).to_not have_content document.title
+    expect(page).not_to have_content document.title
   end
 
 end

spec/models/document_spec.rb

@@ -19,7 +19,7 @@ describe Document do
         expect(Document.admin).to include admin_document1
         expect(Document.admin).to include admin_document2
         expect(Document.admin).to include admin_document3
-        expect(Document.admin).to_not include user_document
+        expect(Document.admin).not_to include user_document
       end
 
     end