I've just published draft #4 of SRFI 170.  It was submitted by
John Cowan, author of the SRFI.

  <https://srfi.schemers.org/srfi-170/>

Here are the commit comments on the draft:

  : editorial and minor functional changes
  : remove false claim about /dev/tty
  : markup changes

Here's the diff:

  <https://github.com/scheme-requests-for-implementation/srfi-170/compare/5467168147f3abf71032b3a5894a8e6b81fef28b...5d47464fb783d61cbb2238f77decf4ac204e9bae>

Regards,

SRFI Editor