message: fix vhdl 2008 /**/
diff: @@ -201,6 +201,7 @@ BIT_STRING_LITERAL: ( INTEGER )? BASE_SPECIFIER DBLQUOTE (
  // [TODO] tool_directive removed
  COMMENT: '--' ( ~'\n' )* -> channel(HIDDEN);
  +BLOCK_COMMENT: '/*' .*? '*/' -> channel(HIDDEN);
  TAB: ( '\t' )+ -> skip;
  SPACE: ( SPACE_CHARACTER )+ -> skip;
  NEWLINE: '\n' -> skip;
  