Comments are assigned multiple times

[nikic]

As reported in #36, a code snippet like

/* this is a common multiline comment */
$a * $b == 1 + 2;

will associate the comment with all of the Equals node, the Mul node and the Variable node for $a, basically all nodes that share the same starting token. The comment should only be associated with the outermost node.

[jhodgdon-drp]

Another related issue is #469 I think