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Issue description

On chapter 3 section 3 it is asked to create empty files in Documents folder with extension .odf.

[user@host ~]$ touch Videos/blockbuster1.ogg
[user@host ~]$ touch Videos/blockbuster2.ogg
[user@host ~]$ touch Documents/thesis_chapter1.odf
[user@host ~]$ touch Documents/thesis_chapter2.odf
[user@host ~]$

But later, on section 5, it's asked to copy the files and directory to folder ProjectX, but those files are a .txt instead of .odf.

Steps to reproduce:

Workaround:

Expected result: