Article wrapper

This test attempts to demonstrate the three hard cases: horizontal spans, vertical spans, and missing entries.

CALS:

a1b1-c2d1
a2-a4d2
b3c3d3
b4c4-d4
a5b5 d5

HTML:

a1 b1-c2 d1
a2-a4 d2
b3 c3 d3
b4 c4-d4
a5 b5   d5