~jaro/balkon

ref: 9e3b0ec7fd4a92e3d2dba81cd00dadc4dfe4006c balkon/src/Data/Text/ParagraphLayout/Internal/ParagraphExtents.hs -rw-r--r-- 925 bytes
Allow paragraphRect without point 0,0.
Parametrise rectangle union bias.
Separate interface-independent constants.