This shortens paths and improves consistency between test target names
and paths to the source and output files.  Most of the work was
completed by this script, followed by mild cleanup of nonconforming
cases.

for makefile in `git ls-files 'src/*makefile'`; do
    if rg -q 'DIRS.*\bexamples\b' $makefile; then
        base=$(dirname $makefile)
        dirs=$(cd $base/examples && ls -d tests tutorials 2>/dev/null | xargs echo)
        perl -pi -e "s#^(DIRS.*)\bexamples\b#\1${dirs}#" $makefile
        git rm $base/examples/makefile
        for t in $dirs; do
            git mv $base/examples/$t $base/
            perl -pi -e "s#^(LOCDIR[[:space:]]*=).*#\1 $base/$t/#" $base/$t
        done
    fi
done

git grep -l -E -z 'examples/(tutorials|tests)' | xargs -0 perl -pi -e 's#examples/(tutorials|tests)#\1#g'
git checkout @ \
    src/docs/website/documentation/changes/ \
    src/benchmarks/results/