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The comment on the zigzag cases said the open zigzag grown by 1.5 leaves stroker loops whose faces the distance test drops. With the turned branch's distance test measuring points in the turned frame, or dropping no face at all, the three zigzag cases still pass and only the plate case fails (201 contours instead of 101). The comment now says what the zigzag cases check: one turn for the low path, none for the path stood on end, and the same region from both. The plate comment says its narrow holes are dropped by the distance test measured at points turned back into the plate's frame.