Merge branch 'hw_3' into 'main'

I finally truly understand the difference between origin (fork) and upstream, 

and the workflow behind it. So thanks a lot!

 2011  git branch

 2012  git status

 2013  git pull

 2014  git status

 2015  git remote add upstream https://gitlab.fi.muni.cz/red-hat/mastering-git.git

 2016  git remote -v

 2017  git pull upstream

 2018  git status

 2019  git pull --all

 2020  git branch

 2021  git branch hw_3

 2022  git status

 2023  git switch hw_3

 2024  ls

 2025  cd class3_homework/

 2026  ls

 2027  git status

 2028  nano 533109.txt

 2029  git status

 2030  git log

 2031  git add .

 2032  git status

 2033  git commit -m "add 533109.txt (hw_3)"

 2034  git status

 2035  git log

 2036  git push origin hw_3

 2037  history