Python 3.7 Windows Help Behaviour

[BlindAnagram]

In Python 3.7.0 on Windows the help file (python370.chm) displays with a
fixed line length and does not adjust its line length when the user
expands the help window horizontally.  This behaviour is different to
that of the Python 3.6 help file (python360.chm) which adjusts its text
to fit the horizontal width of the help window.

Is this a deliberate change or one that can be turned on or off in some
way (I prefer the Python 3.6 behaviour)?