fix plot_data output and code-format

src/afl-fuzz-init.c

@@ -1419,6 +1419,8 @@ void setup_dirs_fds(afl_state_t *afl) {
           "# unix_time, cycles_done, cur_path, paths_total, "
           "pending_total, pending_favs, map_size, unique_crashes, "
           "unique_hangs, max_depth, execs_per_sec\n");
+  fflush(afl->fsrv.plot_file);
+
   /* ignore errors */
 
 }