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doc: pdf: Use single column for the index

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The index at the end of the PDF document can contain pretty long strings
that don't fit in the default 2-column layout.
This commit makes the index use a single-column.

Note: this relies on LaTeX package idxlayout which should already be
included in the packages recommended for installation in our
instructions.

Signed-off-by: Benjamin Cabé <benjamin@zephyrproject.org>
This commit is contained in:
Benjamin Cabé 2023-11-06 12:39:57 +01:00 • committed by Carles Cufí
commit abc334016f
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doc/conf.py
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@ -184,6 +184,7 @@ latex_elements = {
"papersize": "a4paper",
"maketitle": open(ZEPHYR_BASE / "doc" / "_static" / "latex" / "title.tex").read(),
"preamble": open(ZEPHYR_BASE / "doc" / "_static" / "latex" / "preamble.tex").read(),
"makeindex": r"\usepackage[columns=1]{idxlayout}\makeindex",
"fontpkg": textwrap.dedent(r"""
\usepackage{noto}
\usepackage{inconsolata-nerd-font}