Ironically, the image at the top says 'replace by' when it should be 'replace with'.
"Nitpicker was written by Niels Lohmann during the final stages of this thesis." > ... his thesis
"At that time, every second page looked like the one on the left when it came back from his supervisor. " > ... on the right.
"Make sure you the negation of 'can' applies to the activity rather than to the ability to carry out the activity."