Merge branch 'hw03' into 'main'

Before this course, I didn't really know how git works, so all the topics covered so far helped me understand how to use git effectively as well as gain a deeper understanding of the abstract concepts behind version control and collaborative work.

cd mastering-git/

git status

git pull origin main

git switch -c hw03

ls

cd class3_homework/

nano 539936.txt

git status

nano 539936_commands.txt