Thus said Todd C. Miller on Thu, 23 Apr 2026 20:32:59 -0600:

> Is that the issue you are describing, or is it something different?

Also, it's not just column 0. If you place the cursor on the first space
(or any space really) on the first line of your example and then run the
command !)fmt filter you'll get a 3rd behavior.

I'm not  sure if  this is  misbehavior or just  some application  of the
definition of "sentence" as given in the man page.

Andy