texmath-0.12.5: test/roundtrip/span.native
[ EIdentifier "Y" , EOver False (ESymbol Op "\8592") (EIdentifier "f") , EIdentifier "X" , EOver False (ESymbol Op "\8594") (EIdentifier "g") , EIdentifier "Z" ]
[ EIdentifier "Y" , EOver False (ESymbol Op "\8592") (EIdentifier "f") , EIdentifier "X" , EOver False (ESymbol Op "\8594") (EIdentifier "g") , EIdentifier "Z" ]