I claim the ornamental design for a hedge trimmer, as shown and described.
FIG. 1 is a left side view of a hedge trimmer according to the new design.
FIG. 2 is a right side view of the hedge trimmer shown in FIG. 1.
FIG. 3 is a rear view of the hedge trimmer shown in FIG. 1.
FIG. 4 is a front view of the hedge trimmer shown in FIG. 1.
FIG. 5 is a top view of the shredder shown in FIG. 1.
FIG. 6 is a bottom view of the hedge trimmer shown in FIG. 1; and,
FIG. 7 is a side perspective view of the hedge trimmer shown in FIG. 1.
The appearance of the hedge trimmer between the break lines forms no part of the claimed design. The portions of the hedge trimmer shown in broken lines are to show portions of the article and form no part of the claimed design.