TTL KT generates warnings on website build

[ybyzek]

This happens on the commit introduced by #761

[12:26:25] ~/git/kafka-tutorials(master) ✗: (cd ~/git/kafka-tutorials && bundle exec jekyll serve --livereload --trace)
Configuration file: /Users/yeva/git/kafka-tutorials/_config.yml
            Source: /Users/yeva/git/kafka-tutorials
       Destination: /Users/yeva/git/kafka-tutorials/_site
 Incremental build: disabled. Enable with --incremental
      Generating... 
asciidoctor: WARNING: <stdin>: line 40: no callout found for <1>
asciidoctor: WARNING: <stdin>: line 41: no callout found for <2>
asciidoctor: WARNING: <stdin>: line 43: no callout found for <4>
asciidoctor: WARNING: <stdin>: line 60: no callout found for <3>
                    done in 4.705 seconds.
 Auto-regeneration: enabled for '/Users/yeva/git/kafka-tutorials'
LiveReload address: http://127.0.0.1:35729
    Server address: http://127.0.0.1:4000
  Server running... press ctrl-c to stop.

Note:

asciidoctor: WARNING: <stdin>: line 40: no callout found for <1>
asciidoctor: WARNING: <stdin>: line 41: no callout found for <2>
asciidoctor: WARNING: <stdin>: line 43: no callout found for <4>
asciidoctor: WARNING: <stdin>: line 60: no callout found for <3>

cc: @sarwarbhuiyan in case you know what the issue may be

[sarwarbhuiyan]

Will look at this.

[sarwarbhuiyan]

Figured it out. If you do a and follow it with something like a Java comment, it doesn't like it.

Pushing a fix as part of another PR.

[ybyzek]

For tracking, IIUC this is fixed by 29644c2