message: sv2017 fix COMMA in event_expression
diff: @@ -5,7 +5,7 @@ options { tokenVocab=sv2017Lexer; }
  * IEEE1800-2017 grammar optimized for performance in the cost of allowing some ivalid syntax.
  * This is the case mainly for specific expression values which can appear only in some specifc scope.
  *
  - * This parser grammar is nearly target language independen. You have to replace "_input.LA".
  + * This parser grammar is nearly target language independen. You have to replace "_input->LA".
  */
  @@ -968,10 +968,13 @@ select:
  )* ( LSQUARE_BR array_range_expression RSQUARE_BR )?;
  /************************************************ event_expression ****************************************************/
  -event_expression:
  - LPAREN event_expression (COMMA event_expression)* RPAREN
  +event_expression_item:
  + LPAREN event_expression RPAREN
  | ( edge_identifier )? expression ( KW_IFF expression )?
  - | event_expression KW_OR event_expression
  + | event_expression_item KW_OR event_expression
  +;
  +event_expression:
  + event_expression_item ( COMMA event_expression_item )*
  ;
  /************************************************ sequence_expr *******************************************************/
  