Revert #133817 This reverts commit0585134e70, reversing changes made to5530869e0f. #133817 unfortunately only converted the `println!` instances to `eprintln!`, meaning that some test output (via compiletest/bootstrap) was messed up because stdout/stderr output interleaved improperly when some `println!` instances were converted to `eprintln!` instances, while some `print!` instances remain unchanged. This made reading test output annoying for contributors cc #133879. Closes #133879 by reverting. #133817 can be relanded in the future when `print!` instances are also matched with `println!` instances. cc `@clubby789` This is a clean revert so I'm going to self-approve this PR.
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