* test/rubygems/test_gem_commands_help_command.rb: Add one

`require` because if run test-all with test/unit parallel
  running, sometimes this test fails by some constants not found.
  The error reason is some worker doesn't require the file needed by
  this test. This issue is related to [ruby-core:36168].

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@33232 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,11 @@
+Fri Sep  9 11:00:55 2011  Shota Fukumori  <sorah@tubusu.net>
+
+	* test/rubygems/test_gem_commands_help_command.rb: Add one
+	  `require` because if run test-all with test/unit parallel
+	  running, sometimes this test fails by some constants not found.
+	  The error reason is some worker doesn't require the file needed by
+	  this test. This issue is related to [ruby-core:36168].
+
 Fri Sep  9 10:22:03 2011  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* thread.c (rb_thread_select): fix a typo to initialize efds

test/rubygems/test_gem_commands_help_command.rb

@@ -3,6 +3,7 @@ require "rubygems/test_case"
 require "rubygems/commands/help_command"
 require "rubygems/format"
 require "rubygems/command_manager"
+require_relative "rubygems_plugin"
 
 class TestGemCommandsHelpCommand < Gem::TestCase
   def setup