Default for --delta

Hi,

One last item for today :-)

I was observing larger-than-expected delta signature sizes for some
files.  I went looking for why, and came across the fixed block size in
the manpage.

Per
https://unix.stackexchange.com/questions/539169/what-is-default-block-size-in-rsync
, I believe that this would give approximately the same block sizes as
rsync uses:

--delta sig:square2:1:1:700:131072

I wonder if this might be a future default?  Or perhaps documented in
the manpage?  This would avoid having exceptionally large delta
signatures for things like multi-GB video files and such.

Thanks!

- John