What's the point of the summary? But "why" is very important for the future code owners. Year or tho later someone else adding a new fix may have a question ab

What's the point of the summary? But "why" is very important for the future code owners. Year or tho later someone else adding a new fix may have a question about the existing parts to avoid breaking them. And the only thing he can rely is `git blame` to figure out "why it's implemented in this particular way"