class Rails::Html::TargetScrubber

If set, attributes included will be removed.
attributes=
If set, elements included will be stripped.
tags=
sanitization, Rails::Html::TargetScrubber targets them for removal.
Where Rails::Html::PermitScrubber picks out tags and attributes to permit in
=== Rails::Html::TargetScrubber

def allowed_node?(node) 

def allowed_node?(node)
  !@tags.include?(node.name)
end

def scrub_attribute?(name) 

def scrub_attribute?(name)
  @attributes.include?(name)
end