2 Checks for equal operands to comparison, logical and
3 bitwise, difference and division binary operators (`==`, `>`, etc., `&&`,
4 `||`, `&`, `|`, `^`, `-` and `/`).
7 This is usually just a typo or a copy and paste error.
10 False negatives: We had some false positives regarding
11 calls (notably [racer](https://github.com/phildawes/racer) had one instance
12 of `x.pop() && x.pop()`), so we removed matching any function or method
13 calls. We may introduce a list of known pure functions in the future.