Arthur, can you make these two minor edits that I missed for the submission:

- In the Rationale section, the term "digit group" refers to any
continuous span of digits without underscores. E.g. the number 123_456
has two digit groups: 123 and 456. However, in the Specification section
(Implications of the rule subsection) I carelessly wrote:

     The rule excludes at least the following things:
     * Leading underscores in any group of digits.
     * Trailing underscores in any group of digits.

I think these list items are confusing. Can they be changed to:

     * Leading underscores before digits.
     * Trailing underscores after digits.

It's still not super clear but the other examples in the SRFI should
make it unambiguous.

In the "The rule includes at least the following things:" list, the
first item could also be clarified to "Underscores between digits in
numbers of any radix (...)". So the words "between digits" would be added.

- Line up the semicolons between conforming and non-conforming numbers
in the "Complex numbers" examples section.

Thanks a lot if this is still possible and sorry for the trouble!