emilk opened a new pull request, #17565:
URL: https://github.com/apache/datafusion/pull/17565

   * Related: https://github.com/apache/arrow-rs/pull/8290
   
   ## Rationale for this change
   I believe that error messages should be as readable as possible. Aim for 
`rustc` more than `gcc`.
   
   `Display` is the nice, user-facing formatter. Debug is for… well, debugging.
   
   ## What changes are included in this PR?
   Change a bunch of `{:?}` format string to `{}`. I'm sure I missed a lot of 
them, because I know of no way to enforce this without
   * https://github.com/rust-lang/rust-clippy/issues/8581
   
   ## Are these changes tested?
   I assume CI runs `cargo test` :)
   
   ## Are there any user-facing changes?
   Yes! Error messages should be a bit more readable now, especially once this 
lands: 
   
   * https://github.com/apache/arrow-rs/pull/8290


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