Fix test to avoid failure from the order of Dir.foreach

The order of Dir.foreach, which is internally used in Pathname), is not
stable.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@38589 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

test/rubygems/test_gem_doctor.rb

@@ -61,7 +61,7 @@ Removed file specifications/c-2.gemspec
 
     OUTPUT
 
-    assert_equal expected, @ui.output
+    assert_equal expected.lines.sort, @ui.output.lines.sort
 
     assert_equal Gem.dir,  @userhome
     assert_equal Gem.path, [@gemhome, @userhome]
@@ -114,7 +114,7 @@ Extra file specifications/c-2.gemspec
 
     OUTPUT
 
-    assert_equal expected, @ui.output
+    assert_equal expected.lines.sort, @ui.output.lines.sort
 
     assert_equal Gem.dir,  @userhome
     assert_equal Gem.path, [@gemhome, @userhome]