[clang-tools-extra] readability-identifier-naming should add universal default options (PR #171686)

[Dominik Kaszewski via cfe-commits]

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@@ -241,3 +244,4 @@ struct OptionEnumMapping<readability::IdentifierNamingCheck::CaseType> {
 } // namespace clang::tidy
 
 #endif // LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_READABILITY_IDENTIFIERNAMINGCHECK_H
+
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dkaszews wrote:

Empty newline at end of file is something that clang-format appears to treat differently depending on version, even for same `.clang-format`. Will revert. 

https://github.com/llvm/llvm-project/pull/171686