Merge the help message into a single function, so that we can use it somewhere else. Signed-off-by: BangLang Huang <banglang.huang@foxmail.com> (cherry picked from commit 2a253e7cdbacd1bd19da80ea6f35a93b42655c3b)
Merge the help message into a single function, so that we can use it somewhere else. Signed-off-by: BangLang Huang <banglang.huang@foxmail.com> (cherry picked from commit 2a253e7cdbacd1bd19da80ea6f35a93b42655c3b)