`accept(3)` can be found in https://github.com/sschaef/scala-ide/blob/issue/semantic-highlighting-improve/org.scala-ide.sdt.core/src/scala/tools/eclipse/lexical/ScalaPartitionTokeniser.scala#L92

I did it there to include them into the code block comment. But if you find it more useful to exclude them from the code block, it can be done that way too.