Do not journalize blank description changes (#8712).

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@6147 e93f8b46-1217-0410-a6f0-8f06a7374b81

test/unit/issue_test.rb

@@ -733,6 +733,22 @@ class IssueTest < ActiveSupport::TestCase
     assert_equal old_description, detail.old_value
     assert_equal new_description, detail.value
   end
+  
+  def test_blank_descriptions_should_not_be_journalized
+    IssueCustomField.delete_all
+    Issue.update_all("description = NULL", "id=1")
+    
+    i = Issue.first
+    i.init_journal(User.find(2))
+    i.subject = "blank description"
+    i.description = "\r\n"
+    
+    assert_difference 'Journal.count', 1 do
+      assert_difference 'JournalDetail.count', 1 do
+        i.save!
+      end
+    end
+  end
 
   def test_saving_twice_should_not_duplicate_journal_details
     i = Issue.find(:first)