Detect acknowledgment comments that don't require a response.
Returns true only when: no question mark, matches an acknowledgment keyword, and under 100 chars.
Conservative -- missing a real acknowledgment (false negative) is safer than suppressing a substantive response (false positive).
Detect acknowledgment comments that don't require a response. Returns true only when: no question mark, matches an acknowledgment keyword, and under 100 chars. Conservative -- missing a real acknowledgment (false negative) is safer than suppressing a substantive response (false positive).