rs(1) on OpenBSD
The text 4f129bef7eaf, as OpenBSD 5.8, OpenBSD 5.7, OpenBSD 5.6, OpenBSD 5.5 shipped it.
reshape a data array
Flags it lists
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-C -
-E -
-G -
-H -
-K -
-S -
-T -
-c -
-e -
-g -
-h -
-j -
-k -
-m -
-n -
-s -
-t -
-w -
-y -
-z