Never mind -- it's not too far before an aligning edge occurs, so it's just a matter of a fairly long pen-up [negative-number] designation at the end of the diagonal lineset code lines. Try this [minimally tested]:
;; TEST.pat -- only ONE definition, called *TEST [copy to separate file with real pattern name]
*TEST, description here if desired
90, 0,0, 11.75,1, 10.5,-13
231.34019175, 0,0, 14.79746394,0.31234752, 1.60078106,-73.63592873
308.65980825, 0,0, 14.79746394,-0.31234752, 1.60078106,-73.63592873
NOTE that while this code window doesn't allow it, if you put this in a .pat file of its own, it needs to end with a hard return / blank line, not just at the end of the code content. And the file name [not including the .pat filetype ending] must exactly match the pattern name defined in it.
Kent Cooper, AIA