Make behaviour of NumberNode::isEquivalentTo more obvious with respect to -0.0 and NaN.
Make behaviour of NumberNode::isEquivalentTo more obvious with respect to -0.0 and NaN.

#codehealth

PiperOrigin-RevId: 373202102

nawawi/closure-compiler,google/closure-compiler,nawawi/closure-compiler,nawawi/closure-compiler,monetate/closure-compiler,monetate/closure-compiler,google/closure-compiler,google/closure-compiler,monetate/closure-compiler,nawawi/closure-compiler,ChadKillingsworth/closure-compiler,monetate/closure-compiler,ChadKillingsworth/closure-compiler,google/closure-compiler,ChadKillingsworth/closure-compiler,ChadKillingsworth/closure-compiler