> the git commit already contains information about which files are affected;
Contra: while this is true, it's worth considering how 'information about which files are effected' scales when examining the history of a repo. A commit message that simplifies and clarifies the intent is more useful than one that requires a future reader to read each git commit in full to understand the effect.
Contra: while this is true, it's worth considering how 'information about which files are effected' scales when examining the history of a repo. A commit message that simplifies and clarifies the intent is more useful than one that requires a future reader to read each git commit in full to understand the effect.