add presenter for status badge

app/helpers/ci_status_helper.rb

@@ -123,6 +123,6 @@ module CiStatusHelper
   end
 
   def status_title(pipeline)
-    "This pipeline is redundant as a newer pipeline exists (canceled by ##{pipeline.auto_canceled_by_id} pipeline)" if pipeline.auto_canceled_by_id? && pipeline.canceled?
+    Ci::PipelineStatusBadgePresenter.new(pipeline).status_title
   end
 end

app/presenters/ci/pipeline_status_badge_presenter.rb

+module Ci
+  class PipelineStatusBadgePresenter < Gitlab::View::Presenter::Delegated
+    presents :pipeline
+
+    def auto_canceled?
+      canceled? && auto_canceled_by_id?
+    end
+
+    def status_title
+      "Pipeline is redundant and is auto-canceled by Pipeline ##{pipeline.auto_canceled_by_id}" if auto_canceled?
+    end
+  end
+end

app/serializers/pipeline_entity.rb

@@ -84,6 +84,6 @@ class PipelineEntity < Grape::Entity
   end
 
   def status_tooltip
-    "This pipeline is redundant as a newer pipeline exists (canceled by ##{pipeline.auto_canceled_by_id} pipeline)" if pipeline.auto_canceled_by_id? && pipeline.canceled?
+    Ci::PipelineStatusBadgePresenter.new(pipeline).status_title
   end
 end