removing edits where setup is referred to as a method and not a verb

railties/test/generators/app_generator_test.rb

@@ -98,7 +98,7 @@ class AppGeneratorTest < Rails::Generators::TestCase
   include GeneratorsTestHelper
   arguments [destination_root]
 
-  # brings set up, teardown, and some tests
+  # brings setup, teardown, and some tests
   include SharedGeneratorTests
 
   def default_files

railties/test/generators/plugin_generator_test.rb

@@ -30,7 +30,7 @@ def application_path
     "#{destination_root}/test/dummy"
   end
 
-  # brings set up, teardown, and some tests
+  # brings setup, teardown, and some tests
   include SharedGeneratorTests
 
   def test_invalid_plugin_name_raises_an_error

railties/test/generators/shared_generator_tests.rb

@@ -1,7 +1,7 @@
 # frozen_string_literal: true
 
 #
-# Tests, set up, and teardown common to the application and plugin generator suites.
+# Tests, setup, and teardown common to the application and plugin generator suites.
 #
 module SharedGeneratorTests
   def setup