Simon Cozens 65bc6105f7
[feaLib] Allow empty aalt features (#3110)
* Demote "feature has not been defined" to a warning

* Rework test

* Not my black
2023-05-17 15:08:08 +01:00
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2020-07-15 17:16:12 +01:00
2022-12-13 11:26:36 +00:00