Sorry to keep emailing this: the first one doesn’t work on Google Groups’ 
web interface, the second one doesn’t work on iOS’s Outlook (Did I mention 
I hate Google Groups?).

Last attempt: you should see 1 CodeBlock and 4 images:

# base on unicode combination like these
┋❵⇔❴┋ 
┋❵❴┋

If it still doesn’t work, use @jgm’s links

   - https://groups.google.com/d/msg/pandoc-discuss/1bKIuyBnWaQ/7_D-ZkLQDQAJ 
   - https://groups.google.com/d/msg/pandoc-discuss/1bKIuyBnWaQ/mdXTzRrpCQAJ 
   - https://groups.google.com/d/msg/pandoc-discuss/1bKIuyBnWaQ/8O_nA3kfCgAJ 
   - https://groups.google.com/d/msg/pandoc-discuss/1bKIuyBnWaQ/tAAZmfEOCwAJ 
   - https://groups.google.com/d/msg/pandoc-discuss/1bKIuyBnWaQ/PwwweE8vDQAJ 

​

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