ping(8): a missing space in an error message

[piotr]

--- sbin/ping/ping.c.orig       Tue Feb 11 19:41:39 2020
+++ sbin/ping/ping.c    Mon Sep 21 09:11:28 2020
@@ -351,7 +351,7 @@ main(int argc, char *argv[])
                                errx(1, "interval is too small: %s", optarg);
                        if (interval.tv_sec < 1 && ouid != 0) {
                                errx(1, "only root may use an interval smaller"
-                                   "than one second");
+                                   " than one second");
                        }
                        options |= F_INTERVAL;
                        break;