~jaro/balkon

ref: 8260355fb3f33df740336431f49546ec581eef92 balkon/test/Data/Text/ParagraphLayout/SpanData.hs -rw-r--r-- 945 bytes
Store span index in ResolvedSpan.
Implement absolute line heights with half-leadings.
Implement "plain" interface.
Separate tests by module.