The ornamental design for an automobile, as shown and described.
FIG. 1 is a front perspective view of an automobile showing our new design;
FIG. 2 is a rear perspective view thereof;
FIG. 3 is a left side view thereof;
FIG. 4 is a right side view thereof;
FIG. 5 is a front view thereof;
FIG. 6 is a rear view thereof; and,
FIG. 7 is a top view thereof.
The claimed design is indicated by the relatively dark portions in the figures, while the relatively light portions are environmental and form no part of the claimed design.