Updating the Prim Ref page

[Willy Tschager]

a would be more like "some missing faces have no adjacent edges"
Also, p can have not all edges be parallel to eachother, but groups of independently parallel ones

Nomenclature

Boxes are named boxF, with F representing the number of faces a box has. The suffix E represents the number of edges removed.

F and E are may followed by an additional letter. The hyphen is removed if F is accompanied by a modifier.

Face modifiers:

    o - faces are opposite to each other
    t - faces are all touching each other (usually, it's implied, but box4t.dat is a thing)
    u - missing faces form a U-shape

Edge letters:

    p - groups of edges are parallel to each other
    a - some missing faces have no adjacent edges