In the install and library docs, I changed the text to refer to
packaging instead of distutils. I also checked that the documented
paths correctly reflect what’s really defined in sysconfig; the main
difference with paths defined in distutils.install is that include
directories don’t end with the distribution name anymore (i.e. distutils
uses include/python3.3/spam, sysconfig include/python3.3), I have no
idea why.
I chose “setupcfg” as prefix instead of “packaging-setupcfg” because the scope
of the spec is not limited to packaging: it’s intended as a language-agnostic
document for packaging tools developers as well as Python authors.
I tried shortening the sidebar ToC with the tocdepth option instead, but it has
a bug which caused all headings with a level deeper than the tocdepth value to
all have the same section number, which was a usability regression rather than
in improvement.