The ornamental design for a tent, as shown and described.
FIG. 1 is a perspective view of the tent according to the present invention;
FIG. 2 is a front view of the tent as shown in FIG. 1, the left side view, right side view and rear view being identical to FIG. 2 and therefore omitted;
FIG. 3 is a top view of the tent as shown in FIG. 1; and,
FIG. 4 is a bottom view of the tent, as shown in FIG. 1.
The broken lines represent in the figures form no part of the claimed design.