Confusion about version numbering scheme

[Josef Wolf]

Hello all,

in order to find out details for
https://sourceware.org/pipermail/newlib/2020/017688.html
I decided to git-bisect newlib-3.1.0 up to newlib-3.2.0.

And on that, I'm somewhat confused about newlib version numbering scheme.

How comes that cygwin-3_0-branch and cygwin-3_0_x-release are SUCCESSORS of
newlib-3.1.0 tag?

Thbis makes me wonder whether
ftp://sourceware.org/pub/newlib/newlib-3.1.0.tar.gz was really created from
the newlib-3.1.0 tag?

-- 
Josef Wolf
jw@raven.inka.de