Citing the landmark school desegregation ruling Brown v. Board of Education, three federal appeals court judges have urged their colleagues to determine whether “separate but equal” passes muster in the workplace.In a dissent last week, the judges contended the full 7th U.S. Circuit Court of Appeals should take up the case of a black sales manager who alleges he was transferred from a store in an Hispanic neighborhood to one in an African-American neighborhood by a supervisor anxious to preserve both locations …