Change wording from ': ' to ' - '

src/api.c

@@ -68,7 +68,7 @@ remind(char * who)
     /*                    " (@" IRC_BLUE "%s" IRC_GREEN ")" IRC_STOP, */
     /*                    title, desc, repo)) */
     if (-1 == asprintf(&r,
-                       IRC_RED "%s: " IRC_YELLOW "%s" IRC_STOP,
+                       IRC_RED "%s - " IRC_YELLOW "%s" IRC_STOP,
                        title, desc))
     { /* this will probably never happen. But it implies a memory failure */
       r = strdup(IRC_RED "No memory!" IRC_STOP);