[clang-tools-extra] [clang-tidy]Add new check readability-avoid-nested-conditional-operator (PR #78022)

[via cfe-commits]

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+.. title:: clang-tidy - readability-avoid-nested-conditional-operator
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+readability-avoid-nested-conditional-operator
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EugeneZelenko wrote:

Please adjust length.

https://github.com/llvm/llvm-project/pull/78022