[ci] Fix error with "name" vs "global name" bar

pwnlib/tubes/ssh.py

@@ -828,7 +828,7 @@ def process(self, argv=None, executable=None, tty=True, cwd=None, env=None, time
             >>> print(s.process('false', preexec_fn=uses_globals).recvall().strip().decode()) # doctest: +ELLIPSIS
             Traceback (most recent call last):
             ...
-            NameError: name 'bar' is not defined
+            NameError: ... name 'bar' is not defined
 
             >>> s.process('echo hello', shell=True).recvall()
             b'hello\n'