Christoph M. Becker a2f8c78183 Fix #74940: DateTimeZone loose comparison always true ...

Since `DateTimeZone` does not implement a `compare_objects` handler,
nor has any properties, two `DateTimeZone` instances always compare as
being equal, even if they designate totally different timezones.  Even
worse, after calling `var_dump()` on these objects, the actual
comparison may yield a correct result.

We therefore introduce a `compare_objects` handlers, which prevents
different behavior before/after `var_dump()`, and which allows us to
clearly define the intended semantics.

2020-03-30 09:03:40 +02:00

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