Tar file should untar into its own directory

[markstock]

It is common for tar and tar.gz (and .zip) files on Linux to always unpack into a single subdirectory in cwd. So many projects do this that it is surprising (and messy) when one does not. Please consider making the tar file contain a only a directory with the same name as the file name root.

tar -xzf ~/Downloads/MeshLab2023.12d-linux.tar.gz

should generate only ./MeshLab2023.12d-linux inside of which are usr, AppRun and the like.