Consistent use of single and double quotes

railties/test/generators/model_generator_test.rb

@@ -264,39 +264,39 @@ def test_existing_migration_is_removed_on_force
     error = capture(:stderr) { run_generator ["Account", "--force"] }
     assert_no_match(/Another migration is already named create_accounts/, error)
     assert_no_file old_migration
-    assert_migration 'db/migrate/create_accounts.rb'
+    assert_migration "db/migrate/create_accounts.rb"
   end
 
   def test_invokes_default_test_framework
     run_generator
     assert_file "test/models/account_test.rb", /class AccountTest < ActiveSupport::TestCase/
 
-    assert_file 'test/fixtures/accounts.yml', /name: MyString/, /age: 1/
-    assert_generated_fixture('test/fixtures/accounts.yml',
-                             {'one'=>{'name'=>'MyString', 'age'=>1}, 'two'=>{'name'=>'MyString', 'age'=>1}})
+    assert_file "test/fixtures/accounts.yml", /name: MyString/, /age: 1/
+    assert_generated_fixture("test/fixtures/accounts.yml",
+                             {"one"=>{"name"=>"MyString", "age"=>1}, "two"=>{"name"=>"MyString", "age"=>1}})
   end
 
   def test_fixtures_use_the_references_ids
     run_generator ["LineItem", "product:references", "cart:belongs_to"]
 
-    assert_file 'test/fixtures/line_items.yml', /product_id: \n  cart_id: /
-    assert_generated_fixture('test/fixtures/line_items.yml',
+    assert_file "test/fixtures/line_items.yml", /product_id: \n  cart_id: /
+    assert_generated_fixture("test/fixtures/line_items.yml",
                              {"one"=>{"product_id"=>nil, "cart_id"=>nil}, "two"=>{"product_id"=>nil, "cart_id"=>nil}})
   end
 
   def test_fixtures_use_the_references_ids_and_type
     run_generator ["LineItem", "product:references{polymorphic}", "cart:belongs_to"]
 
-    assert_file 'test/fixtures/line_items.yml', /product_id: \n  product_type: Product\n  cart_id: /
-    assert_generated_fixture('test/fixtures/line_items.yml',
+    assert_file "test/fixtures/line_items.yml", /product_id: \n  product_type: Product\n  cart_id: /
+    assert_generated_fixture("test/fixtures/line_items.yml",
                              {"one"=>{"product_id"=>nil, "product_type"=>"Product", "cart_id"=>nil},
                               "two"=>{"product_id"=>nil, "product_type"=>"Product", "cart_id"=>nil}})
   end
 
   def test_fixtures_respect_reserved_yml_keywords
-    run_generator ["LineItem", "no:integer", "Off:boolean", 'ON:boolean']
+    run_generator ["LineItem", "no:integer", "Off:boolean", "ON:boolean"]
 
-    assert_generated_fixture('test/fixtures/line_items.yml',
+    assert_generated_fixture("test/fixtures/line_items.yml",
                              {"one"=>{"no"=>1, "Off"=>false, "ON"=>false}, "two"=>{"no"=>1, "Off"=>false, "ON"=>false}})
   end