Chapter "files": How to tell if a file is a directory or a regular file in file hierarchy

[elena19m]

In chapter "files", file "files.rst", section "2) Ierahie de fișiere", one cannot tell when a file is regular file or directory.
One suggestion should be to use tree -F that puts "/" at the end of a directory name or add a note to specify how to tell apart between the two file types.

For the USO lab, I have modified the text directly in the lab, adding the following note to the text: (Notă: Numele cu extensie din structura sunt fișiere, restul sunt directoare) and replacing "Favorite" with "Favorite.txt", but I don't know whether this is the best approach or not (see: https://ocw.cs.pub.ro/courses/uso/laboratoare/laborator-01/files#exercitii_-_ierarhii_de_fisiere_si_directoare).