> change '2.4 or higher' to '2.4 to 2.7'.
"Python 2" should be enough.
> Perhaps we should add "These instructions assume that <repository>/Doc/
> is the current directory." Then we would not have to repeat in multiple
> places.
There was a somewhat related discussion about this in #16814.
> But even with that correction, making docs will still fail for 3.x.
Maybe we should just updated Sphinx :) See #10224.
> Perhaps "suspicious" is available on *nix, just not documented.
> Could someone check?
It is. See also #15759.
> "Then, make an output directory, e.g. under `build/`"
On Linux sphinx-build/"make html" takes care of this already. Is this not the case on Windows? If not maybe the make.bat should be updated.