~jaro/balkon

ref: 88a5b6c714c5543b01d63d836ad403b5755d8d76 balkon/test/Data/Text/ParagraphLayout/Internal/BiDiLevelsSpec.hs -rw-r--r-- 3.0 KiB 
Improve BiDi handling of numbers and neutrals.

Add tests for mixed text direction.

Convert legacy span directions into levels.