lib/asciidoctor-epub3/converter.rb in asciidoctor-epub3-1.0.0.alpha.3 vs lib/asciidoctor-epub3/converter.rb in asciidoctor-epub3-1.5.0.alpha.4

@@ -842,10 +842,10 @@
     when 'epub3', 'kf8'
       # all good
     when 'mobi'
       document.attributes['ebook-format'] = 'kf8'
     else
-      document.attributes['ebook-format'] = 'epub3'
+      ebook_format = document.attributes['ebook-format'] = 'epub3'
     end
     document.attributes[%(ebook-format-#{ebook_format})] = ''
     # Only fire SpineItemProcessor for top-level include directives
     include_processor SpineItemProcessor.new(document)
     treeprocessor { process {|doc| doc.id = DocumentIdGenerator.generate_id doc } }