We claim the ornamental design for a cable cover, as shown and described.
FIG. 1 is a perspective view of a first embodiment of a cable cover showing our design;
FIG. 2 is a right elevation view thereof;
FIG. 3 is a left elevation view thereof;
FIG. 4 is a rear elevation view thereof;
FIG. 5 is a front elevation view thereof;
FIG. 6 is a top plan view thereof; and,
FIG. 7 is a bottom plan view thereof.
The cable cover is shown with a symbolic break in its length. The appearance of any portion of the article between the break lines forms no part of the claimed design.