Chapter 3 : fetch only works on files, not directories

In Chapter 3 of the Second Edition, it says on page 35 that the src for the copy module can be a file or directory (and implies the same with fetch).
This is in fact not true as I discovered by experimenting on Ansible Core/Base 2.11 and as stated in the Ansible documentation (same for version 2.9 and 2.10).
The src parameter has to be a file. So if you want to copy a directory you have to use synchronize or rsync module (or put the directory in an archive and use the unarchive module as suggested on page 36).
Hope this helps !

Start by locating Chapter 3 of the Second Edition and review the statements on pages 35–36 about the copy and fetch modules. Verify the src behavior against the referenced Ansible documentation, then update the chapter so it does not claim that directories work and accurately points readers to synchronize, rsync, or unarchive alternatives.

Written by the indexing model from the issue text.