The draft reads:

    For this proposal, a TAB should be counted as exactly four spaces.

That is wrong. TAB is worth 8 spaces if anything. Anyway, mixing tabs
and spaces for indentation is a neverending source of confusion. There
should be features to have this cause warnings or errors. See PEP-8 for
how the Python people handle that issue:

   http://www.python.org/peps/pep-0008.html

HTML4 also has a warning about the tab-indentation issue:

http://www.w3.org/TR/1999/REC-html401-19991224/struct/text.html#edef-PRE

Anyway, the current proposal is is worst possible in regard to that
specific issue.

About the rest of the SRFI, I have too much a hard time understanding
the production rules to make any constructive comment, but the examples
look right to me.

--
                                                            -- ddaa