Org-mode need the <---> separator in columns shortcode

[mem-]

The <---> separator is needed when using columns shortcode in Org-mode. Don't remove that functionionallity.

See my comment on the commit that introduced the deprecated warning 2c8c093#commitcomment-180514920

Regards,
// mem

[alex-shpak]

Hello! I will need to test it, but I was under impression that Plan Lists should just work for columns?