Apply the `books` fix when uninstalling DevHelp files as well.
Extend the fix in commit dcf0885f
to handle make uninstall, as required by make distcheck.
However, make distcheck on Traprain still fails due to misplaced HTML files.
Extend the fix in commit dcf0885f
to handle make uninstall, as required by make distcheck.
However, make distcheck on Traprain still fails due to misplaced HTML files.