~jaro/balkon

ref: 1555a8cc7b5b6ad8c7f365564876dc6f5649f19c balkon/test/Data/Text/ParagraphLayout/Internal/RunSpec.hs -rw-r--r-- 1.7 KiB 
Move non-public modules into Internal namespace.

Minimise working with Data.Text.Internal.

Link to Span using a generic wrapper.

Implement "plain" interface.

Separate tests by module.