* lib/rubygems: Update to RubyGems 2.4.1 master(713ab65)

Complete history at:
  https://github.com/rubygems/rubygems/blob/master/History.txt#L3-L216
* test/rubygems:  ditto.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@47582 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

test/rubygems/test_gem_resolver_vendor_set.rb

@@ -11,10 +11,12 @@ class TestGemResolverVendorSet < Gem::TestCase
   def test_add_vendor_gem
     name, version, directory = vendor_gem
 
-    @set.add_vendor_gem name, directory
+    added = @set.add_vendor_gem name, directory
 
     spec = @set.load_spec name, version, Gem::Platform::RUBY, nil
 
+    assert_equal spec, added
+
     assert_equal "#{name}-#{version}", spec.full_name
 
     assert_equal File.expand_path(directory), spec.full_gem_path
@@ -55,6 +57,20 @@ class TestGemResolverVendorSet < Gem::TestCase
     assert_equal expected, found
   end
 
+  def test_find_all_prerelease
+    name, _, directory = vendor_gem 'a', '1.a'
+
+    @set.add_vendor_gem name, directory
+
+    req = Gem::Resolver::DependencyRequest.new dep('a'), nil
+
+    assert_empty @set.find_all req
+
+    req = Gem::Resolver::DependencyRequest.new dep('a', '>= 0.a'), nil
+
+    refute_empty @set.find_all req
+  end
+
   def test_load_spec
     error = Object.const_defined?(:KeyError) ? KeyError : IndexError