Fix RuboCop offense Lint/SendWithMixinArgument (#39887).

git-svn-id: https://svn.redmine.org/redmine/trunk@22980 e93f8b46-1217-0410-a6f0-8f06a7374b81

.rubocop_todo.yml

@@ -231,11 +231,6 @@ Lint/ParenthesesAsGroupedExpression:
     - 'test/unit/attachment_test.rb'
     - 'test/unit/lib/redmine/export/pdf_test.rb'
 
-# This cop supports safe autocorrection (--autocorrect).
-Lint/SendWithMixinArgument:
-  Exclude:
-    - 'test/object_helpers.rb'
-
 Lint/ShadowingOuterLocalVariable:
   Enabled: false
 

test/object_helpers.rb

@@ -288,7 +288,7 @@ module TrackerObjectHelpers
     end
   end
 end
-Tracker.send :include, TrackerObjectHelpers
+Tracker.include TrackerObjectHelpers
 
 module IssueObjectHelpers
   def close!
@@ -300,4 +300,4 @@ module IssueObjectHelpers
     Issue.generate!(attributes.merge(:parent_issue_id => self.id))
   end
 end
-Issue.send :include, IssueObjectHelpers
+Issue.include IssueObjectHelpers