kqueue: tidy up indentation in man page example

Fixes: e07b0c12ba ("[patch][doc] Fix EXAMPLE in kqueue(2)")
Sponsored by:	The FreeBSD Foundation

lib/libc/sys/kqueue.2

@@ -771,8 +771,7 @@ main(int argc, char **argv)
 		errx(EXIT_FAILURE, "Event error: %s", strerror(event.data));
 	    else
 		printf("Something was written in '%s'\en", argv[1]);
-}
-
+	}
     }
 }
 .Ed