Mike Fährmann 54525d2e21
[formatter] implement slice operator as format specifier
this allows using a slice operator alongside other (special) format
specifiers like J, to first join list elements to a string and then
trimming that with a slice.

{tags:J, /[:50]}
2022-06-25 16:52:58 +02:00
..
2015-10-03 14:51:13 +02:00
2021-10-13 04:07:41 +02:00
2022-03-01 03:09:57 +01:00
2022-05-23 18:30:26 +02:00