nanoc-asciidoctor.rb in nanoc-asciidoctor-2.0.2

- old
+ new

@@ -1,9 +1,19 @@
\ No newline at end of file
+raise 'The `nanoc-asciidoctor` gem is obsolete as of Nanoc 4.8.0. To upgrade:
+
+1. In your Gemfile, make sure that Nanoc is at least version 4.8, e.g.
+       gem \'nanoc\', \'~> 4.8\'
+
+2. Remove `gem \'nanoc-asciidoctor\'` from your Gemfile
+
+3. Remove `require \'nanoc-asciidoctor\'` from anywhere in your site
+
+4. Run `bundle install`'