Description:
1) qpdf installs the empty directory /usr/share/doc/qpdf/. Should package_qpdf()

56c56
< rm -rf "${pkgdir}"/usr/share/doc/qpdf/README-doc.txt
---
> rm -rf "${pkgdir}"/usr/share/doc/qpdf

?
package_qpdf-docs() creates /usr/share/doc/qpdf/ directory anyway.
2) Even though the documentation is built from source, the source array requires
https://github.com/qpdf/qpdf/releases/download/release-${pkgname}-${pkgver}/${pkgname}-${pkgver}-doc.zip . What for? The notes at https://qpdf.readthedocs.io/en/stable/packaging.html#packaging-documentation looks to me relevant.
3) My experience is that --html-doc for configure is redundant since --enable-doc-maintenance is given. My understating is that https://github.com/qpdf/qpdf/blob/main/build-scripts/build-doc support my claim. It could be that I was confused in my experimentation.
4) The PKGBUILD has a comment about how to build the docs. It refers to https://github.com/qpdf/qpdf/blob/main/build-scripts/build-doc . Which is referred by https://qpdf.readthedocs.io/en/stable/installation.html#building-documentation as "for the qpdf distribution". https://github.com/qpdf/qpdf/blob/main/build-scripts/build-doc seems to build the doc.zip file. Is it relevant to arch packages? I think https://qpdf.readthedocs.io/en/stable/installation.html#building-documentation and https://qpdf.readthedocs.io/en/stable/packaging.html#packaging-documentation might have more information. My understanding is that the bottom paragraph of https://github.com/qpdf/qpdf/blob/main/README-doc.txt mentions these 2 URL. In addition, https://github.com/qpdf/qpdf refers to https://github.com/qpdf/qpdf/blob/main/build-scripts/build-doc as build-doc script. Isn't it Debian related? Perhaps the comment how to build the docs should be removed altogether? Or replaced by https://github.com/qpdf/qpdf/blob/main/README-doc.txt ?

Additional info:
* package version(s): 10.6.2-2
* config and/or log files etc.: (PKGBUILD)
* link to upstream bug report, if any: arch packaging related.

Steps to reproduce:
1) For 1st point above: Install the qpdf package (without the documentation package) and examine the content of /usr/share/doc/qpdf.
2) For the 2nd: Remove the doc.zip file prior to building the package and test the consequences.
3) 3rd point: Just try that.
4) 4th point: It is my understanding of https://github.com/qpdf/qpdf and https://qpdf.readthedocs.io . It could be I am wrong.