The ornamental design for a cabletensioner, as shown and described.
FIG. 1 is a perspective view of the cable tensioner according to the invention. The hook rendered in broken line in this view shows the cable tensioner in condition of use and forms no part of the claimed design.
FIG. 2 is a top view thereof.
FIG. 3 is a right side view thereof.
FIG. 4 is a left side view thereof.
FIG. 5 is a bottom view thereof.
FIG. 6 is a view of one end thereof, which has been magnified for clarity; and,
FIG. 7 is a view of an opposite end thereof which has been magnified for clarity.
The end of the cable tensioner is shown in an alternative position relative to the base of the cable tensioner in the FIGS. 3 and 4 views from that shown in FIG. 6.