func Raw(n *ast.Node) (string, error)
Raw returns the raw value of the string node, with string escapes left in place. Calling UnquoteRaw on non-string node doesn't panic, but is otherwise undefined.
func Unquote(n *ast.Node) (string, error)
Unquote returns the value of the string node. Calling Unquote on non-string node doesn't panic, but is otherwise undefined.