//usage: "\n -s Display only a total for each argument"
//usage: "\n -x Skip directories on different filesystems"
//usage: IF_FEATURE_HUMAN_READABLE(
-//usage: "\n -h Sizes in human readable format (e.g., 1K 243M 2G )"
+//usage: "\n -h Sizes in human readable format (e.g., 1K 243M 2G)"
//usage: "\n -m Sizes in megabytes"
//usage: )
//usage: "\n -k Sizes in kilobytes"