correct optional organization

pythonwhois/parse.py

@@ -247,7 +247,7 @@ registrant_regexes = [
 	"   Registrant:\n      (?P<organization>.+)\n      (?P<name>.+)  (?P<email>.+)\n      (?P<phone>.*)\n      (?P<fax>.*)\n      (?P<street>.*)\n      (?P<city>.+), (?P<state>[^,\n]*)\n      (?P<country>.+)\n", # .com.tw (Western registrars)
 	"Registrant:\n(?P<organization1>.+)\n(?P<organization2>.+)\n(?P<street1>.+?)(?:,+(?P<street2>.+?)(?:,+(?P<street3>.+?)(?:,+(?P<street4>.+?)(?:,+(?P<street5>.+?)(?:,+(?P<street6>.+?)(?:,+(?P<street7>.+?))?)?)?)?)?)?,(?P<city>.+),(?P<country>.+)\n\n   Contact:\n      (?P<name>.+)   (?P<email>.+)\n      TEL:  (?P<phone>.+?)(?:(?:#|ext.?)(?P<phone_ext>.+))?\n      FAX:  (?P<fax>.+)(?:(?:#|ext.?)(?P<fax_ext>.+))?\n", # .com.tw (TWNIC/SEEDNET, Taiwanese companies only?)
 	"Registrant Contact Information:\n\nCompany English Name \(It should be the same as the registered/corporation name on your Business Register Certificate or relevant documents\):(?P<organization1>.+)\nCompany Chinese name:(?P<organization2>.+)\nAddress: (?P<street>.+)\nCountry: (?P<country>.+)\nEmail: (?P<email>.+)\n", # HKDNR (.hk)
-	"Registrant ID:(?P<handle>.+)\nRegistrant Name:(?P<name>.*)\n(Registrant Organization:(?P<organization>.+)\n)?Registrant Street1:(?P<street1>.+?)\nRegistrant City:(?P<city>.+)\nRegistrant State:(?P<state>.+)\nRegistrant Postal Code:(?P<postalcode>.+)\nRegistrant Country:(?P<country>[A-Z]+)\nRegistrant Phone:(?P<phone>.+?)\nRegistrant Fax:(?P<fax>.*)\nRegistrant Email:(?P<email>.+)\n", # Realtime Register
+	"Registrant ID:(?P<handle>.+)\nRegistrant Name:(?P<name>.*)\n(?:Registrant Organization:(?P<organization>.+)\n)?Registrant Street1:(?P<street1>.+?)\nRegistrant City:(?P<city>.+)\nRegistrant State:(?P<state>.+)\nRegistrant Postal Code:(?P<postalcode>.+)\nRegistrant Country:(?P<country>[A-Z]+)\nRegistrant Phone:(?P<phone>.+?)\nRegistrant Fax:(?P<fax>.*)\nRegistrant Email:(?P<email>.+)\n", # Realtime Register
 	"owner:\s+(?P<name>.+)", # .br
 	"person:\s+(?P<name>.+)", # nic.ru (person)
 	"org:\s+(?P<organization>.+)", # nic.ru (organization)