Cigar spacer

1. 1The ornamental design for a cigar spacer as shown and described.

FIG. 1 is a front perspective view of a cigar spacer embodying my new design;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a top view thereof;
FIG. 5 is a bottom view thereof;
FIG. 6 is a left side view thereof; and,
FIG. 7 is a right side view thereof.