docs: pdfdocs: Pull LaTeX preamble part out of conf.py
Quote from Jon's remark [1]: I do notice that Documentation/conf.py is getting large and unapproachable. At some future point, it might be nice to pull all of the latex stuff out into a separate file where it won't scare people who stumble into it by accident. Pull LaTeX preamble settings added since commit 3b4c9632 ("docs: conf.py: adjust the LaTeX document output") out into sphinx/kerneldoc-preamble.sty. It will be copied to the build directory by the added "latex_additional_files" setting in conf.py. As a bonus, LaTeX/TeX code can be maintained without escaping backslashes. To compensate the loss of change history in sphinx/kerneldoc-preamble.sty, here is a list of changes made in conf.py: - f7ebe6b7 ("docs: Activate exCJK only in CJK chapters") - 0afd4df0 ("docs: pdfdocs: Prevent column squeezing by tabulary") - 659653c9 ("docs: pdfdocs: Refactor config for CJK document") - e291ff6f ("docs: pdfdocs: Add CJK-language-specific font settings") - 7eb368cc ("docs: pdfdocs: Choose Serif font as CJK mainfont if possible") - 35382965 ("docs: pdfdocs: Preserve inter-phrase space in Korean translations") - 77abc2c2 ("docs: pdfdocs: One-half spacing for CJK translations") - 788d28a2 ("docs: pdfdocs: Permit AutoFakeSlant for CJK fonts") - 29ac9822 ("docs: pdfdocs: Teach xeCJK about character classes of quotation marks") - 7c5c18bd ("docs: pdfdocs: Fix typo in CJK-language specific font settings") - aa872e06 ("docs: pdfdocs: Adjust \headheight for fancyhdr") - 8716ef41 ("docs: pdfdocs: Tweak width params of TOC") - 66939df5 ("docs: pdfdocs: Switch default CJK font to KR variants") - 7b686a2e ("docs: pdfdocs: Enable CJKspace in TOC for Korean titles") - 5d9158e3 ("docs/translations: Skip CJK contents if suitable fonts not found") - b774cc46 ("docs: pdfdocs: Move CJK monospace font setting to main conf.py") [1]: https://lore.kernel.org/all/87zgmr66cn.fsf@meer.lwn.net/Suggested-by: Jonathan Corbet <corbet@lwn.net> Signed-off-by: Akira Yokosawa <akiyks@gmail.com> Link: https://lore.kernel.org/r/aaa9dca1-27c0-c414-77f3-c5587db0cc5b@gmail.comSigned-off-by: Jonathan Corbet <corbet@lwn.net>
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