Some warn messages miss space between words, such as:

Use of 'buffering' argument is deprecated  and ignoredsince Python 3.0.

in bz2 library, and:

keyfile and certfile are deprecated, use acustom context instead

in many libraries, such as poplib and smtplib.

Other warn messages contain too much spaces between words, such as:

The 'filename' attribute will be removed in future versions.  Use 'source' instead.

in configparser library.

I'm not sure if such issues affect older versions of Python. I might need help on that.