[rubygems/rubygems] make bundled gemst list as constant under Gem namespace

https://github.com/rubygems/rubygems/commit/438eac5447

lib/bundler/rubygems_ext.rb

@@ -29,6 +29,12 @@ unless Gem.ruby_version.to_s == RUBY_VERSION || RUBY_PATCHLEVEL == -1
 end
 
 module Gem
+
+  BUNDLED_GEMS = %w[
+    abbrev observer getoptlong resolv-replace rinda
+    nkf syslog drb mutex_m csv base64
+  ]
+
   class Specification
     include ::Bundler::MatchMetadata
     include ::Bundler::MatchPlatform

lib/bundler/rubygems_integration.rb

@@ -230,14 +230,10 @@ module Bundler
 
       return if [kernel, ::Kernel].any?{|klass| klass.respond_to?(:no_warning_require)}
 
-      bundled_gems = %w[
-        abbrev observer getoptlong resolv-replace rinda
-        nkf syslog drb mutex_m csv base64
-      ]
       [kernel, ::Kernel].each do |kernel_class|
         kernel_class.send(:alias_method, :no_warning_require, :require)
         kernel_class.send(:define_method, :require) do |file|
-          if bundled_gems.include?(file)
+          if ::Gem::BUNDLED_GEMS.include?(file)
             unless specs.to_a.map(&:name).include?(file)
               target_file = begin
                               Bundler.default_gemfile.basename