Diff gnu-c-intro-ref-0_pre20230521 with a gnu-c-intro-ref-9999

/usr/portage/app-doc/gnu-c-intro-ref/gnu-c-intro-ref-9999.ebuild 2023-10-09 14:52:28.268368319 +0300
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	)
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"
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PATCHES=(
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	"${FILESDIR}"/gnu-c-intro-ref-9999-autotools.patch
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)
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src_prepare() {
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	default
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Thank you!