Clarify variable name

Author: fkdkent

test/unit/issue_test.rb

@@ -2875,28 +2875,28 @@ def test_saving_twice_should_not_duplicate_journal_details
 
   # done_ratio should change to 100 when the status is closed and Setting.issue_done_ratio equal issue_field_and_closed_status
   test "when updating to closed status should update done_ratio according to Setting.issue_done_ratio" do
-    issue_status = IssueStatus.find(5)
-    issue_status.update!(:default_done_ratio => 90)
+    closed_status = IssueStatus.find(5)
+    closed_status.update!(:default_done_ratio => 90)
 
     with_settings :issue_done_ratio => 'issue_field' do
       issue = Issue.generate!(:status_id => 1, :done_ratio => 30)
-      issue.status = issue_status
+      issue.status = closed_status
       issue.save!
 
       assert_equal 30, issue.read_attribute(:done_ratio)
     end
 
     with_settings :issue_done_ratio => 'issue_status' do
       issue = Issue.generate!(:status_id => 1, :done_ratio => 30)
-      issue.status = issue_status
+      issue.status = closed_status
       issue.save!
 
       assert_equal 90, issue.read_attribute(:done_ratio)
     end
 
     with_settings :issue_done_ratio => 'issue_field_and_closed_status' do
       issue = Issue.generate!(:status_id => 1, :done_ratio => 30)
-      issue.status = issue_status
+      issue.status = closed_status
       issue.save!
 
       assert_equal 100, issue.read_attribute(:done_ratio)