add S_RENUMBER support so when a new line is entered all the line
treeb425be695aa7a4385822e50c83419148039f7502
-rw-r--r-- 6865 README
drwxr-xr-x - common
drwxr-xr-x - docs
drwxr-xr-x - ex
drwxr-xr-x - vi