Strange formatting of comments

[fpga-guy]

Unfortunately javadoc style multiline comments preceding a rule cause a strange formatting effect. The following rule is moved to just after the comment ending. Also, multiple single line comments are indented and extra lines are added.

grammar Funny;

/**
This is a funny grammar that confuses Antlr4Formatter
*/
test : 'a' 'b' 'c' test2 EOF;

//
// test number 2
//
test2 : '1' '2' '3';

turns into

grammar Funny;

/**
This is a funny grammar that confuses Antlr4Formatter
*/ test
   : 'a' 'b' 'c' test2 EOF
   ;
   //
   
   // test number 2
   
   //
   
test2
   : '1' '2' '3'
   ;

This seems very odd to me. I'm not sure if this is intentional or not.