The ornamental design for a spiritlevelendcap, as shown and described.
FIG. 1 is a top perspective view of a spirit level including a spirit level end cap of the present invention, the spirit level is shown in dashed lines for illustrative purposes only and forms no part of the design;
FIG. 2 is a top perspective view of the spirit level end cap of FIG. 1;
FIG. 3 is a front or rear view thereof;
FIG. 4 is a top view thereof;
FIG. 5 is a bottom view thereof;
FIG. 6 is left view thereof;
FIG. 7 is a right view thereof; and,
FIG. 8 is a top perspective view of a spirit level including a pair of spirit level end caps of the present invention, the spirit level is shown in dashed lines for illustrative purposes only and forms no part of the design.