Fix #1589

Asciidoctor now fails if a template dir is passed but the dir does not
actually exist.

Rails has changed the semantic of active records'destroy_all.

This should hopefully fix #1589

Author: jnavila

lib/tasks/book2.rake

@@ -83,12 +83,12 @@ def genbook(code, &get_content)
   # revert internal links decorations for ebooks
   content.gsub!(/<<.*?\#(.*?)>>/, "<<\\1>>")
 
-  asciidoc = Asciidoctor::Document.new(content, template_dir: template_dir, attributes: { "lang" => code})
+  asciidoc = Asciidoctor::Document.new(content, attributes: { "lang" => code})
   html = asciidoc.render
   alldoc = Nokogiri::HTML(html)
   number = 1
 
-  Book.destroy_all(edition: 2, code: code)
+  Book.where(edition: 2, code: code).destroy_all
   book = Book.create(edition: 2, code: code)
 
   alldoc.xpath("//div[@class='sect1']").each_with_index do |entry, index|