The ornamental design for a tent, as shown and described.
FIG. 1 is a front, left side, top perspective view of a tent showing my new design;
FIG. 2 is a front, left side, top perspective view thereof showing the tent when the tent is staked to the ground and when the front and side flaps are closed;
FIG. 3 is a front elevational view thereof;
FIG. 4 is a rear elevational view thereof;
FIG. 5 is a left side elevational view thereof;
FIG. 6 is a right side elevational view thereof;
FIG. 7 is a top plan view thereof; and,
FIG. 8 is a bottom plan view thereof.
The broken lines depict portions of the tent that form no part of the claimed design.