[rubygems/rubygems] Privatize some test utils

386b3b85ca

test/rubygems/test_gem.rb

@@ -2022,6 +2022,8 @@ You may need to `bundle install` to install missing gems
     ENV['SOURCE_DATE_EPOCH'] = old_epoch
   end
 
+  private
+
   def ruby_install_name(name)
     with_clean_path_to_ruby do
       orig_RUBY_INSTALL_NAME = RbConfig::CONFIG['ruby_install_name']

test/rubygems/test_gem_installer.rb

@@ -2259,6 +2259,8 @@ gem 'other', version
     assert_kind_of(String, installer.gem)
   end
 
+  private
+
   def util_execless
     @spec = util_spec 'z'
     util_build_gem @spec