Don't return Link header if it's blank

Author: Moncef Belyamani

lib/api-pagination.rb

@@ -22,7 +22,7 @@ def paginate(scope)
         %(<#{url}?#{new_params.to_param}>; rel="#{k}")
       end
 
-      headers['Link'] = links.join(', ')
+      headers['Link'] = links.join(', ') unless links.empty?
     end
 end
 

spec/controllers/numbers_controller_spec.rb

@@ -34,7 +34,7 @@ def index
     context 'without enough items to give more than one page' do
       it 'should not paginate' do
         get :index, count: 20
-        response.headers['Link'].should be_blank
+        response.headers.keys.should_not include("Link")
       end
     end