lessecho(1) on FreeBSD
The text 0f58e4c7dab1, as FreeBSD 12.1-RELEASE, FreeBSD 12.0-RELEASE, FreeBSD 11.3-RELEASE, FreeBSD 11.2-RELEASE shipped it.
expand metacharacters
Flags it lists
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-a -
-cx -
-dn -
-ex -
-fn -
-mx -
-nn -
-ox -
-pn