On Fri, Oct 18, 2019 at 03:39:41PM BST, cho...@jtan.com wrote:
> Raf Czlonka writes:
> > On Fri, Oct 18, 2019 at 03:12:37PM BST, cho...@jtan.com wrote:
> > Is this what you had in mind?
> >
> >     set editor="EXINIT='set wraplen=72' /usr/bin/vi"

I forgot to mention - this is the line in my muttrc(5).

> I'm not sure that I'm happy with it doing it mid-insert. I'd prefer an
> explicit action or insert mode itself being adapted so that it includes
> a final reformat (ie. when I press escape (if the appropriate flag is
> enabled)).

Then I clearly misunderstood what you meant.

> Also it has the fault that if, say, the 4th character of a word causes a
> line break, then reducing that word to less than 4 characters doesn't
> remove it (although the newline can be deleted as though it were
> inserted as usual, which is good).
> 
> Matthew
> 

As others have already mentioned - fmt(1) from base... or par(1)
from ports.

Regards,

Raf

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