I claim the ornamental design for an edge liner, as shown and described.
FIG. 1 is a front view of the edge liner, the rear view being a mirror image thereof.
FIG. 2 is a right side view, the left side view being a mirror image thereof.
FIG. 3 is a top plan view; and,
FIG. 4 is a bottom plan view.
The edge liner is shown broken away in FIGS. 1, 3, and 4 of the drawing to indicate in-determinant length, it being understood that it has a uniform shape and appearance through out its length.