> Also I don't trust comments, I have to see commit history That only works if the commit message is informative. A commit message that says "updated tests" is

> Also I don't trust comments, I have to see commit history That only works if the commit message is informative. A commit message that says "updated tests" is just as informative as a comment that says "assign value to a" (following your code comment example). Commit messages are as, if not more important, than code comments (given VCS tools like git blame that can associate code changes with a comment explaining what was done and why).