[ruby/rdoc] Should teardown in reverse order of setup

https://github.com/ruby/rdoc/commit/00fb4dd2a3

test/rdoc/test_rdoc_parser_changelog.rb

@@ -14,6 +14,8 @@ class TestRDocParserChangeLog < RDoc::TestCase
 
   def teardown
     @tempfile.close!
+
+    super
   end
 
   def test_class_can_parse

test/rdoc/test_rdoc_ri_driver.rb

@@ -33,11 +33,11 @@ class TestRDocRIDriver < RDoc::TestCase
   end
 
   def teardown
-    super
-
     ENV['HOME'] = @orig_home
     ENV['RI'] = @orig_ri
     FileUtils.rm_rf @tmpdir
+
+    super
   end
 
   DUMMY_PAGER = ":;\n"

test/rdoc/test_rdoc_ri_paths.rb

@@ -36,12 +36,12 @@ class TestRDocRIPaths < RDoc::TestCase
   end
 
   def teardown
-    super
-
     Gem.use_paths(*@orig_gem_path)
     Gem::Specification.reset
     FileUtils.rm_rf @tempdir
     ENV.replace(@orig_env)
+
+    super
   end
 
   def test_class_each