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- A fold's zone clipped across the root of a tab folded before on the same line kept a sliver of no width there, which made the zone look like it crossed a slanted edge. The one real piece is the zone now (#638). - When the tabs a fold line spans can't take the side beyond them along, because it joins the side that stays through other material (a tab on the inside edge of an L, the fixed point on the far leg), the tabs' own ends fold instead, the same part as with the fixed point on the near leg (#639). Co-authored-by: jonaswre <[email protected]> Co-authored-by: Claude Opus 5.5 <[email protected]>