2 Checks for `a op= a op b` or `a op= b op a` patterns.
5 Most likely these are bugs where one meant to write `a
9 Clippy cannot know for sure if `a op= a op b` should have
10 been `a = a op a op b` or `a = a op b`/`a op= b`. Therefore, it suggests both.
11 If `a op= a op b` is really the correct behavior it should be
12 written as `a = a op a op b` as it's less confusing.