https://github.com/plan9foundation/plan9/commit/5d459b5a09e427ae1acd4e6afcf028853c73946e#diff-7c1a21a7d6592c63d8aa07020db1b758b035d18097afa80d819c10eed54fb58b
It looks like they appeared in Fourth Edition. I immediately wondered if this was some sort of grid experiment at the labs. Ian ------------------------------------------ 9fans: 9fans Permalink: https://9fans.topicbox.com/groups/9fans/Te62da3a037caa944-Mf403010c6465268ad98de34f Delivery options: https://9fans.topicbox.com/groups/9fans/subscription
