layout.tex.erb in review-3.1.0

- old
+ new

@@ -4,9 +4,12 @@
 <%-   [@config['texstyle']].flatten.each do |x| -%>
 \usepackage{<%= x %>}
 <%-   end -%>
 <%- end -%>
 
+%% backward compatibility (defined in config.erb)
+\reviewbackcompatibilityhook
+
 \begin{document}
 
 %% begindocument hook
 \ifdefined\reviewbegindocumenthook
 \reviewbegindocumenthook