Clean proxy

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@58820 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

test/net/http/test_http.rb

@@ -225,7 +225,7 @@ class TestNetHTTP < Test::Unit::TestCase
     def host.to_str; raise SocketError, "open failure"; end
     uri = Struct.new(:scheme, :hostname, :port).new("http", host, port)
     assert_raise_with_message(SocketError, /#{host}:#{port}/) do
-      Net::HTTP.get(uri)
+      clean_http_proxy_env{ Net::HTTP.get(uri) }
     end
   end