~jaro/balkon

ref: ae2fb11e89078608bbc1722b8b4096e5b20edf8b balkon/lib/Data/Text/ParagraphLayout/Plain.hs -rw-r--r-- 1.7 KiB 
Deprecate the Plain interface.

Add user data to spans.

Add line numbers to laid out fragments.

Qualify Plain interface.