Handle to look up CGI::EscapeExt instead of using LoadError. cgi/escape is provided snce Ruby 2.3

Author: hsbt

lib/net/http.rb

@@ -1917,11 +1917,8 @@ def proxy_pass
     private
 
     def unescape(value)
-      begin
-        require "cgi/escape"
-      rescue LoadError
-        require "cgi/util"
-      end
+      require 'cgi/escape'
+      require 'cgi/util' unless defined?(CGI::EscapeExt)
       CGI.unescape(value)
     end