The ornamental design for, an automobile, as shown and described.
FIG. 1 is a perspective view of an automobile, showing our new design;
FIG. 2 is another perspective view thereof;
FIG. 3 is a front elevation view thereof;
FIG. 4 is a left side elevation view thereof;
FIG. 5 is a right side elevation view thereof; and,
FIG. 6 is a top plan view thereof.
The rear elevation view is a mirror image of the front elevation view. The broken lines are for illustrative purposes only and form no part of the claimed design.