Mike Fährmann 65744a7a31
use alternative for all falsey values in format strings
… and not just None (#525)

It would be better to consistently use None for all non-existent
fields and/or fields without a valid value, but this is a good
enough workaround for now.
2020-09-19 22:02:47 +02:00
..
2015-10-03 14:51:13 +02:00
2020-09-15 18:07:08 +02:00