tweaked the --help output
diff --git a/aos/atom_code/core/LogDisplayer.cpp b/aos/atom_code/core/LogDisplayer.cpp
index d8d9f94..8f15535 100644
--- a/aos/atom_code/core/LogDisplayer.cpp
+++ b/aos/atom_code/core/LogDisplayer.cpp
@@ -29,6 +29,7 @@
     "  -s, --skip NUMBER     skip NUMBER matching logs\n"
     "  // -m, --max NUMBER     only display up to NUMBER logs\n"
     "  // -o, --format FORMAT  use FORMAT to display log entries\n"
+    "  -h, --help            display this help and exit\n"
     "\n"
     "LEVEL must be DEBUG, INFO, WARNING, ERROR, or FATAL.\n"
     "  It defaults to INFO.\n"