Final content check

[AcademicMJS]

A final check on all the content that is created to find smaller typos, functionality problems etc. ✔️

• [x] Read all the lecture slides
• [x] Read all the website text

I adjusted the following lecture slides (for further details see the different commits for each slide set):

• Lecture 0
• Lecture 1
• Lecture 2
• Lecture 3
• Lecture 4
• Lecture 5
• Lecture 6
• Lecture 7

[AcademicMJS]

Images for the visualization and reporting lecture (5 and 7) are not rendered on the website but in this repo.

To-Do: Check that when finishing the content check.