If your styling contains lots of tags and HTML elements, I would suggest putting them into partials:
<%= render :partial => @audit_log.description rescue nil %>
If you description is created, then it would render the file _created.html.erb in the same folder as the current view
If it is deleted, render _deleted.html.erb automatically.
If description is something else, which has no _something.html.erb file, then nothing would be displayed (without rescue nil, error will occurs)
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If you want to render the partial in some different folder,
<%= render :partial => "some/where/#{@audit_log.description}" %>