Fix generated code for PlSqlParser.g4 #53
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When building the PlSql grammar from https://github.com/antlr/grammars-v4/blob/master/sql/plsql/PlSqlParser.g4 and https://github.com/antlr/grammars-v4/blob/master/sql/plsql/PlSqlLexer.g4, the generated Rust code fails to compile with the following error.
The PlSqlParser.g4 and PlSqlLexer.g4 files need to modified to remove references to self. You can find the modified version at:
https://github.com/peteromoon/antlr4rust/blob/plsqltest/grammars/PlSqlLexer.g4 and https://github.com/peteromoon/antlr4rust/blob/plsqltest/grammars/PlSqlParser.g4.