codereview: Fix uploading for Mercurial 1.6.3

See:
http://selenic.com/repo/hg/rev/32b213b9b22c
http://selenic.com/repo/hg/rev/2096496b40ec

R=rsc, adg
CC=golang-dev
https://golang.org/cl/2072041

lib/codereview/codereview.py

@@ -2494,8 +2494,8 @@ class FakeMercurialUI(object):
 		self.quiet = True
 		self.output = ''
 	
-	def write(self, s):
-		self.output += s
+	def write(self, *args, **opts):
+		self.output += ' '.join(args)
 
 use_hg_shell = False	# set to True to shell out to hg always; slower