waynexia opened a new pull request, #2717:
URL: https://github.com/apache/arrow-datafusion/pull/2717

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   Closes #.
   
    # Rationale for this change
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   I got these clippy lints after updating my rust toolchain to 1.63.
   
   Most warnings come from these rules:
   
   
https://rust-lang.github.io/rust-clippy/master/index.html#derive_partial_eq_without_eq
   https://rust-lang.github.io/rust-clippy/master/index.html#format_push_string
   https://rust-lang.github.io/rust-clippy/master/index.html#borrow_deref_ref
   https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
   
   I'm not sure whether the second rule `format_push_string` is acceptable so I 
split it into another commit.
   
   # What changes are included in this PR?
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   There is no need to duplicate the description in the issue here but it is 
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   Fix clippy warnings.
   
   # Are there any user-facing changes?
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   no


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