Update refal/refal.g4
Update refal/refal.g4

Co-authored-by: Ivan Kochurkin <7704623aa56c2b72c3121ff876cc07e7c36aec52@gmail.com>
antlr/grammars-v4,antlr/grammars-v4,antlr/grammars-v4,antlr/grammars-v4,antlr/grammars-v4,antlr/grammars-v4,antlr/grammars-v4,antlr/grammars-v4,antlr/grammars-v4,antlr/grammars-v4,antlr/grammars-v4,antlr/grammars-v4