Merge RubyGems 3.0.0.beta1.

  * It drop to support < Ruby 2.2
  * Cleanup deprecated methods and classes.
  * Mark obsoleted methods to deprecate.
  * and other enhancements.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@63528 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 3 insertions, 3 deletions

diff --git a/test/rubygems/test_gem_resolver_installer_set.rb b/test/rubygems/test_gem_resolver_installer_set.rb
index e8d82d93b7..9644e0a7a9 100644
--- a/test/rubygems/test_gem_resolver_installer_set.rb
+++ b/test/rubygems/test_gem_resolver_installer_set.rb
@@ -25,8 +25,8 @@ class TestGemResolverInstallerSet < Gem::TestCase
   end
 
   def test_add_always_install_errors
-    @fetcher = Gem::FakeFetcher.new
-    Gem::RemoteFetcher.fetcher = @fetcher
+    @stub_fetcher = Gem::FakeFetcher.new
+    Gem::RemoteFetcher.fetcher = @stub_fetcher
 
     set = Gem::Resolver::InstallerSet.new :both
 
@@ -197,7 +197,7 @@ class TestGemResolverInstallerSet < Gem::TestCase
     def (set.remote_set).prefetch(_)
       raise "called"
     end
-    assert_equal nil, set.prefetch(nil)
+    assert_nil set.prefetch(nil)
   end
 
   def test_prerelease_equals