The ornamental design for the shovel, shown and described.
FIG. 1 is a perspective view of a shovel according to the invention;
FIG. 2 is a front view of the shovel of FIG. 1;
FIG. 3 is back view of the shovel of FIG. 1;
FIG. 4 is a right-side view of the shovel of FIG. 1;
FIG. 5 is a left-side view of the shovel of FIG. 1;
FIG. 6 is a top-side view of the shovel of FIG. 1; and,
FIG. 7 is a bottom-side view of the shovel of FIG. 1.
The broken lines are included for the purpose of illustrating the environment in which the claimed invention is being used, which form no part of the claimed design.