munchlist(1) on Linux
The text 3a2c4da2666c, as Debian 5.0 (Lenny), Debian 4.0 (Etch), Debian 3.1 (Sarge) shipped it.
Interactive spelling checking
Flags it lists
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-B -
-C -
-P -
-S -
-T -
-W -
-b -
-d -
-g -
-h -
-m -
-n -
-p -
-t -
-w -
-x