Dispatch a words_sep event that contains the space between the elements of list literals.
case foo; when bar; end ^^^^^^^^^^^^^^^^^^^^^^^
false ^^^^^
Visit an individual part of a string-like node.
Visit a string that is expressed using a <<~ heredoc.
super(foo) ^^^^^^^^^^
until foo; bar end ^^^^^^^^^^^^^^^^^
bar until foo ^^^^^^^^^^^^^
Visit a node that represents a number. We need to explicitly handle the unary - operator.