Typo caught by : Arfrever Frehtes Taifersar Arahesis.

Lib/nntplib.py

@@ -38,7 +38,7 @@ __all__ = ["NNTP","NNTPReplyError","NNTPTemporaryError",
            "error_data",]
 
 # maximal line length when calling readline(). This is to prevent
-# reading arbitrary lenght lines. RFC 3977 limits NNTP line length to
+# reading arbitrary length lines. RFC 3977 limits NNTP line length to
 # 512 characters, including CRLF. We have selected 2048 just to be on
 # the safe side.
 _MAXLINE = 2048