Prevent 433 response for Nonutf8{User/Real}name (#244)

Sending `NICK foo` after connectClient() causes an ERR_NICKNAMEINUSE
response instead of the expected RPL_WELCOME.

irctest/server_tests/utf8.py

@@ -54,15 +54,15 @@ def testNonutf8Realname(self):
             raise runner.IsupportTokenNotSupported("UTF8ONLY")
 
         self.addClient()
-        self.sendLine(2, "NICK foo")
+        self.sendLine(2, "NICK bar")
         self.clients[2].conn.sendall(b"USER username * * :i\xe8rc\xe9\r\n")
 
         d = self.clients[2].conn.recv(1024)
-        if b" FAIL " in d or b" 468 " in d:  # ERR_INVALIDUSERNAME
+        if b"FAIL " in d or b"468 " in d:  # ERR_INVALIDUSERNAME
             return  # nothing more to test
-        self.assertIn(b" 001 ", d)
+        self.assertIn(b"001 ", d)
 
-        self.sendLine(2, "WHOIS foo")
+        self.sendLine(2, "WHOIS bar")
         self.getMessages(2)
 
     def testNonutf8Username(self):
@@ -71,7 +71,7 @@ def testNonutf8Username(self):
             raise runner.IsupportTokenNotSupported("UTF8ONLY")
 
         self.addClient()
-        self.sendLine(2, "NICK foo")
+        self.sendLine(2, "NICK bar")
         self.sendLine(2, "USER 😊😊😊😊😊😊😊😊😊😊 * * :realname")
         m = self.getRegistrationMessage(2)
         if m.command in ("FAIL", "468"):  # ERR_INVALIDUSERNAME
@@ -80,7 +80,7 @@ def testNonutf8Username(self):
             m,
             command="001",
         )
-        self.sendLine(2, "WHOIS foo")
+        self.sendLine(2, "WHOIS bar")
         self.getMessages(2)