Fix #4983: Weird result for status:DELETED.

app/logical/post_sets/post.rb

@@ -119,7 +119,7 @@ module PostSets
 
     def show_deleted?
       query.select_metatags("status").any? do |metatag|
-        metatag.value.in?(%w[all any active unmoderated modqueue deleted appealed])
+        metatag.value.downcase.in?(%w[all any active unmoderated modqueue deleted appealed])
       end
     end
 

test/functional/posts_controller_test.rb

@@ -184,6 +184,12 @@ class PostsControllerTest < ActionDispatch::IntegrationTest
           get_auth posts_path(tags: "foo"), @user
           assert_select ".tag-change-notice"
         end
+
+        should "show deleted posts for a status:DELETED search" do
+          create(:post, is_deleted: true)
+          get_auth posts_path(tags: "status:DELETED"), @user
+          assert_select ".post-preview.post-status-deleted", count: 1
+        end
       end
 
       context "with a multi-tag search" do