PR: https://github.com/aibasel/downward/pull/157
TODO: update wiki (https://www.fast-downward.org/ForDevelopers/Uncrustify)

Thanks Jendrik! I merged the PR.

Wiki is updated.

Regarding the wiki update, the URL changes a bit. The following instructions worked for me:

wget https://github.com/uncrustify/uncrustify/archive/refs/tags/uncrustify-0.72.0.tar.gz
tar -xzvf uncrustify-0.72.0.tar.gz
cd uncrustify-uncrustify-0.72.0
mkdir build
cd build
cmake ../
make -j4
sudo cp uncrustify /usr/local/bin  # Add binary to a directory on PATH.

I left some comments on Github. I think the changes done to the code by the newer version are all positive, but we should fix the old hacks that are affected. I'm somewhat on the fence about whether uncrustify should introduce things that go beyond reformatting the code, like static_cast.

How would the wiki page change? Are the installation instructions still working in the same way for the new version? Is it working on all systems we want to support (I remember getting the right uncrustify version used to be tricky)?

Is there anything else that has to be changed besides the Github actions, Wiki, and code?

The current uncrustify version (0.67) is quite old and is missing support for many newer C++ features. For example, it produces ugly indentation when a function returns an initializer list. Therefore, we want to switch to a newer version. I suggest version 0.72 because it's the one that is in the repos of all recent Ubuntu versions.