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SubjectRe: [PATCH v3 6/9] docs: pdfdocs: One-half spacing for CJK translations
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Akira Yokosawa <akiyks@gmail.com> writes:

> On Mon, 2 Aug 2021 18:56:16 +0900, Akira Yokosawa wrote:
>> CJK documents are much easier to read with a wider baseline stretch.
>> Applying the onehalfspacing option of "setspace" package looks
>> reasonable.
>>
>> Note: \usepackage{setspace} needs to be before that of hyperref in the
>> preamble. The 'extrapackages' key (available since Sphinx 2.3) is for
>> this purpose.
>
> Sphinx versions < 2.3 ignore 'extrapackages' and generate LaTeX
> sources without setspace package.
> Obviously, building such LaTeX sources will end up in the error of:
>
> ! Undefined control sequence.
> \kerneldocCJKoff ...exeCJKinactive \singlespacing
>
> Current requirement to build pdfdocs is Sphinx 2.4.4, but LaTeX
> sources generated by 1.7.9 can at least be built prior to this change.
>
> Jon, Mauro, do you think this is a regression?

Having the build just fail that way isn't really a good thing...it would
be far better to do the baseline tweaking only with versions of sphinx
that support it or, failing that, to at least refuse to build with a
suitably informative message.

Thanks,

jon

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