TESTS: corrected one test in tests/source/units/case-folding-test.red
TESTS: corrected one test in tests/source/units/case-folding-test.red

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