FTP.dir(): Fix typo in docstring.
diff --git a/Lib/ftplib.py b/Lib/ftplib.py
index 96e83df..d2ff435 100644
--- a/Lib/ftplib.py
+++ b/Lib/ftplib.py
@@ -339,7 +339,7 @@
The argument is a RETR or LIST command.
The callback function (2nd argument) is called for each line,
with trailing CRLF stripped. This creates a new port for you.
- print_lines is the default callback.'''
+ print_line() is the default callback.'''
if not callback: callback = print_line
resp = self.sendcmd('TYPE A')
conn = self.transfercmd(cmd)