~jaro/balkon

ref: 034a323deb9c3858d2396406d7e22410984ba4e6 balkon/test/Data/Text/ParagraphLayout/Internal/TextContainerSpec.hs -rw-r--r-- 3.3 KiB 
Move non-public modules into Internal namespace.

Minimise working with Data.Text.Internal.

Implement run splitting.