[clang-tools-extra] [clang-tidy] add new check readability-enum-initial-value (PR #86129)

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<!--LLVM CODE FORMAT COMMENT: {clang-format}-->


:warning: C/C++ code formatter, clang-format found issues in your code. :warning:

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``````````bash
git-clang-format --diff ffe41819e58365dfbe85a22556c0d9d284e746b9 4e0845a143a820d4a68ffbdced206654c7593359 -- clang-tools-extra/clang-tidy/readability/EnumInitialValueCheck.cpp clang-tools-extra/clang-tidy/readability/EnumInitialValueCheck.h clang-tools-extra/test/clang-tidy/checkers/readability/enum-initial-value.c clang-tools-extra/test/clang-tidy/checkers/readability/enum-initial-value.cpp clang-tools-extra/clang-tidy/readability/ReadabilityTidyModule.cpp
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View the diff from clang-format here.
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``````````diff
diff --git a/clang-tools-extra/clang-tidy/readability/EnumInitialValueCheck.h b/clang-tools-extra/clang-tidy/readability/EnumInitialValueCheck.h
index 6b4e0e28e3..8a0ddd2b38 100644
--- a/clang-tools-extra/clang-tidy/readability/EnumInitialValueCheck.h
+++ b/clang-tools-extra/clang-tidy/readability/EnumInitialValueCheck.h
@@ -13,8 +13,8 @@
 
 namespace clang::tidy::readability {
 
-/// Detects explicit initialization of a part of enumerators in an enumeration, and
-/// relying on compiler to initialize the others.
+/// Detects explicit initialization of a part of enumerators in an enumeration,
+/// and relying on compiler to initialize the others.
 ///
 /// For the user-facing documentation see:
 /// http://clang.llvm.org/extra/clang-tidy/checks/readability/enum-initial-value.html

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https://github.com/llvm/llvm-project/pull/86129