[GROOVY-3309] comparisons with NaN should always return false - ASF JIRA

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The following assertions should all pass; the third fails.

assert !(Double.NaN == 0)
assert !(Double.NaN < 0)
assert !(Double.NaN > 0)

A NaN should also not equal a NaN.

assert Double.NaN != Double.NaN

is duplicated by

GROOVY-4906 Double.NaN == Double.Nan should evaluate to false

relates to

GROOVY-4018 Make the Groovy truth value of NaN be false