Using sets in tests did not check whether the values were written in the right
section or with the right key.

error if faulthandler.dump_tracebacks_later() is missing (e.g. if Python is
compiled without threads).

Add TESTTIMEOUT variable (default: 3600 seconds). Use TESTTIMEOUT=0 to disable
the timeout.
***
fix

It's unclear what this was referring to; most likely, it was about sockets
that the application had already closed, in which case it's not a sockets
problem, but an application problem.

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.

I reworded “wizard” because it is a Windows-specific term.