The ornamental design for an electronicdevicecover, as shown and described.
FIG. 1 is a front perspective view of an electronic device cover.
FIG. 2 is a front view thereof;
FIG. 3 is a back view thereof;
FIG. 4 is a left-side view thereof;
FIG. 5 is a right-side view thereof;
FIG. 6 is a bottom view thereof;
FIG. 7 is a top view thereof;
FIG. 8 is a first unfolded view of the electronic device cover of FIG. 1. The first unfolded view shows the electronic device cover in an unfolded state from the front; and,
FIG. 9 is a second unfolded view of the electronic device cover of FIG. 1. The second unfolded view shows the electronic device cover in an unfolded state from the back.
The dashed broken lines depict portions of the electronic device cover that form no part of the claimed design.