Description
We need to check if all keywords that were non-reserved in the `old` ANTLR3 parser are non-reserved in the ANTLR4 parser. Notable exceptions are join LEFT, RIGHT & FULL keywords; these used to be non-reserved and are now.
We need to check if all keywords that were non-reserved in the `old` ANTLR3 parser are non-reserved in the ANTLR4 parser. Notable exceptions are join LEFT, RIGHT & FULL keywords; these used to be non-reserved and are now.