bug#45679: 28.0.50; python-mode variable font locking is inconsistent

[Doug Davis]

Doug Davis <ddavis@ddavis.io> writes:

> Spoke too soon again; types for individual function arguments _also_
> triggers the issue. Perhaps some recent changes
> (296e4dd15e3754fdddf70d33f2d630462d4b3309 and
> e7b4f465e8b2ec1c8d54a611db7eca44ae350711) associated with font locking
> (which appear to have been meant to add better support for the existence
> of type hits) should be reverted for now.

And this is another commit that touches the font locking code (actually
overwriting the two commits above):
b2ce94fa5eecee0afd0e6237956cfb2b02b8bb0b