[debhelper-devel] Bug#894549: debhelper: dh_usrlocal may remove a direct subdirectory of /usr/local

[Nicolas Boulenguez]

Package: debhelper
Followup-For: Bug #894549

Hello.

This new diff should fix the same issues in dh_usrlocal.
The result is more readable in my opinion, hopefully preventing
similar errors in the future.

It should also be a bit more efficient: instead of sorting two huge
lists of paths all starting with "/usr/share/", it sorts once simple
names in each directory.

When a normal file is encountered, it displays an error instead of a
warning. This does not change much, as rmdir would fail with a less
explicit message when attempting to remove the containing directory.
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