chain2dim(1) on Linux
The text e651b45b05fd, as Debian 11 (Bullseye) shipped it.
two-dimensional match chaining
Flags it lists
-
-global -
-help -
-local -
-maxgap -
-outprefix -
-silent -
-thread -
-v -
-version -
-wf -
-withinborders