[issue20544] Use specific asserts in operator tests

[Mark Lawrence]

Mark Lawrence added the comment:

There are 28 dependencies listed on #16510.  18 have already been closed, presumably with patches committed but I haven't checked them all.  10 are still open including this one.  Can we have a decision now as to whether we move forward with committing all of these changes, subject of course to formal review, or simply close the outstanding ones as "won't fix".

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nosy: +BreamoreBoy
versions: +Python 3.5 -Python 3.3

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