Fix `CustomCops/AssertNot` to allow it to have failure message

Follow up of #32605.

3 files changed, 3 insertions, 3 deletions

diff --git a/railties/test/application/assets_test.rb b/railties/test/application/assets_test.rb
index 9ef123c5b6..4ca6d02b85 100644
--- a/railties/test/application/assets_test.rb
+++ b/railties/test/application/assets_test.rb
@@ -47,7 +47,7 @@ module ApplicationTests
     end
 
     def assert_no_file_exists(filename)
-      assert !File.exist?(filename), "#{filename} does exist"
+      assert_not File.exist?(filename), "#{filename} does exist"
     end
 
     test "assets routes have higher priority" do
diff --git a/railties/test/application/paths_test.rb b/railties/test/application/paths_test.rb
index 0abc5cc9aa..28a9206daa 100644
--- a/railties/test/application/paths_test.rb
+++ b/railties/test/application/paths_test.rb
@@ -37,7 +37,7 @@ module ApplicationTests
     end
 
     def assert_not_in_load_path(*path)
-      assert !$:.any? { |p| File.expand_path(p) == root(*path) }, "Load path includes '#{root(*path)}'. They are:\n-----\n #{$:.join("\n")}\n-----"
+      assert_not $:.any? { |p| File.expand_path(p) == root(*path) }, "Load path includes '#{root(*path)}'. They are:\n-----\n #{$:.join("\n")}\n-----"
     end
 
     test "booting up Rails yields a valid paths object" do
diff --git a/railties/test/application/rake/migrations_test.rb b/railties/test/application/rake/migrations_test.rb
index bf5b07afbd..47c5ac105a 100644
--- a/railties/test/application/rake/migrations_test.rb
+++ b/railties/test/application/rake/migrations_test.rb
@@ -417,7 +417,7 @@ module ApplicationTests
           version = output =~ %r{[^/]+db/migrate/(\d+)_create_authors\.rb} && $1
 
           rails "db:migrate", "db:rollback", "db:forward", "db:migrate:up", "db:migrate:down", "VERSION=#{version}"
-          assert !File.exist?("db/schema.rb"), "should not dump schema when configured not to"
+          assert_not File.exist?("db/schema.rb"), "should not dump schema when configured not to"
         end
 
         add_to_config("config.active_record.dump_schema_after_migration = true")