Fix RuboCop offense Performance/MapMethodChain (#37247).

git-svn-id: https://svn.redmine.org/redmine/trunk@22280 e93f8b46-1217-0410-a6f0-8f06a7374b81

test/functional/news_controller_test.rb

@@ -101,7 +101,7 @@ class NewsControllerTest < Redmine::ControllerTest
     get(:show, :params => {:id => 1})
     assert_response :success
 
-    comments = css_select('#comments .wiki').map(&:text).map(&:strip)
+    comments = css_select('#comments .wiki').map {|e| e.text.strip}
     assert_equal ["This is an other comment", "my first comment"], comments
   end