[docs] [issue35472] python 3.7.2 rc1 bumped the build requirements for no reason

[Julien Palard]

Julien Palard <julien+python at palard.fr> added the comment:

Hi Matthias,

I agree that for the smartquotes issue the 1.6.6 should be enough. But we had multiple small issues fixed in some versions of Sphinx. But mostly for translation and I don't think you're building the translations?

Also the needs_sphinx is only the minimum required version to build, it won't disallow me using sphinx 1.7 or 1.8 on docs.python.org to build the documentation.

The needs_sphinx flag only supports "micro" value since 1.4, but looks compatible with it before (04a8c26eabba3e728a5b74afd15f328f9235b2d0 in the sphinx repo).

So it looks OK to allow 1.6.6 as a minimum required version for 3.7, opening a PR on it.

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