I've just published draft #4 of SRFI 163.  It was submitted by Per
Bothner, author of the SRFI.

  <https://srfi.schemers.org/srfi-163/>

Here are Per's comments on the draft:

  It fixes the bad quotation marks....

  It also is more wishy-washy about implementation-defined extra
  parameters to format-array.

Here's the diff:

  <https://github.com/scheme-requests-for-implementation/srfi-163/compare/d8cf095530b71abe4066eebe92b5f2d8ccc8d0aa...286853e15dc669e88ca2a6184f1456cdc70fa5d3>

Regards,

SRFI Editor