Ruby documentation URL redirects are not working at 100%.
Most do at least get to the new YARD class or module page at ruby.sketchup.com
.
But the specific method anchors are not working, because the old docs used a different way of naming the method anchors.
Example, in this post:
Move all items in group and sub groups to new layer - #6 by DanRathbun
I give this link:
http://www.sketchup.com/intl/en/developer/docs/ourdoc/layer#page_behavior
and it redirects to the class, because the real new link to the instance method is: