From electowiki

This template is for putting on pages migrated from wiki.electorama.com. Example use:


...when placed on the Summability criterion page, shows up as:

This page was migrated from the "Summability criterion" page on wiki.electorama.com. To view the authors prior to the migration, view the "Summability criterion" page edit history prior to 2018-10-01

It's also possible to provide the page name as a parameter.