target below).
.TP
.BR "--mark " "\fIvalue\fP[/\fImask\fP]"
-Matches packets with the given unsigned mark value (if a mask is
-specified, this is logically ANDed with the mask before the
+Matches packets with the given unsigned mark value (if a \fImask\fP is
+specified, this is logically ANDed with the \fImask\fP before the
comparison).