[ruby/open-uri] Use ENV.update

ruby/open-uri@04067e54b9

Author: nobu

test/open-uri/test_ftp.rb

@@ -8,10 +8,10 @@ def with_env(h)
     begin
       old = {}
       h.each_key {|k| old[k] = ENV[k] }
-      h.each {|k, v| ENV[k] = v }
+      ENV.update(h)
       yield
     ensure
-      h.each_key {|k| ENV[k] = old[k] }
+      ENV.update(old)
     end
   end
 

test/open-uri/test_proxy.rb

@@ -11,10 +11,10 @@ def with_env(h)
     begin
       old = {}
       h.each_key {|k| old[k] = ENV[k] }
-      h.each {|k, v| ENV[k] = v }
+      ENV.update(h)
       yield
     ensure
-      h.each_key {|k| ENV[k] = old[k] }
+      ENV.update(old)
     end
   end