Earlier quoted context omitted.
How much working memory/attention span is required to look through 1000 identical lines "-CustomerEmailAddress +CustomerEmail"?
Ideally, you automate a check like that. Because the answer turns out to actually be "humans are profoundly bad at that kind of pattern recognition." A computer will be able to tell that the 497th has a misspelled `CusomerEmail` or that change 829 is a regexp failure that trimmed the boolean "CustomerEmailAddressed" to "CustomerEmailed" with 100% reliability; humans, not so much.
Or that you had to avoid Ctrl+F "CustomerEmail" and see whether you had 1000 matches that matches the number of changed files or only 999 due to some typo.
Or using the web interface to filter by file type to batch your reviews.
Or...
Just that in none of those cases there is anything close to our memory/attention capacity.