TESTS: fix wrong results in some modulo tests on floats.
TESTS: fix wrong results in some modulo tests on floats.

NikolayShubenkovProgSchool/red,iArnold/red,vehar/red,red-eco/red,red-eco/red,vehar/red,rheber/red,NikolayShubenkovProgSchool/red,iArnold/red,rheber/red