Before running the actual atom/source fixture.
The initially written lambda11/7,b8 fixture violates the full distinct and
nonzero rotation hypothesis (denominator7). Use lambda19/12 at b8 instead.
This is a correction to the design before executing that test, not a failed
test being omitted. The chosen boundary row remainsi2, B_i=5 and the
height2 cap sequence remains(0,0,1,1,2). All six atoms can still occur.
