I've just published fixes for errata for SRFI 147.  They
have been prepared by the Marc Nieper-Wißkirchen, the
author, so I have incorporated them into the public document
and added a note to the Status section.

Thank you to Takashi Kato and Shiro Kawai for reporting this
issue.

Here are Marc's comments on this change:

  Please incorporate this pull request into an erratum for
  the spec as per recent discussion on the mailing list.

  Commit Summary

  * Clarify use of begin in transformer specs

  File Changes

  * M srfi-147.html (11)

Here's the diff:

  <https://github.com/scheme-requests-for-implementation/srfi-147/compare/661379ce36655097c0f5fad57df70d0a9f6361de...52facf1e32e00f5ffed3628cb2fd2a5a5c11dc10>

— SRFI Editor