Testing float-valued functions

[Ian Bruene]

On 10/06/2017 10:15 AM, Eric S. Raymond wrote:

> This is why the minimal-change alternative is worth considering at this
> point in our release cycle.  It means you don't have to do that research
> project.

Done, functions that can be simply changed to assertAlmostEqual have 
been, problematic ones have comments documenting the potential problem.

> My advice is to keep the out-of-domain tests, but mark them as low-value
> and disposable if passing them would incur additional complexity costs.

Done.

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