Puppet users - Jun 2014 - 2->3 unlisted incompatible change to array slices?

While migrating our local modules from puppet 2 to puppet 3 I think I've 
found a backwards-incompatible change that's not listed in the release 
notes.  I'd like to verify that what I'm seeing is expected, and make
sure
I'm not missing any other side-effects of the change.

In puppet 2 templates, array slices which returned a single element were 
still returned as an array, so a structure like this was valid:

    <%- myarray[-1].each do |text| -%>
    <%=text%>
    <%- end -%>

In puppet 3 templates this throws an error:
undefined method `each' for "foo":String at ...

It looks like slices that return only a single element are now returned as 
the type of the array element rather than as an array.  I don't see this 
change mentioned anywhere at 
<http://docs.puppetlabs.com/puppet/3/reference/release_notes.html>.

Is there anything else to this change that I'm missing, or are there other 
side-effects to this I should be watching out for?


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