[clang-tools-extra] [clang-tidy] Option to ignore anonymous namespaces in avoid-non-const-global-variables (PR #93827)

[via cfe-commits]

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@@ -41,3 +41,25 @@ The variables ``a``, ``c``, ``c_ptr1``, ``c_const_ptr`` and ``c_reference``
 will all generate warnings since they are either a non-const globally accessible
 variable, a pointer or a reference providing global access to non-const data
 or both.
+
+Options
+-------
+
+.. option:: AllowAnonymousNamespace
+
+   When set to `true` (default is `false`), non-const variables in anonymous namespaces will not generate a warning.
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EugeneZelenko wrote:

Default value is usually stated in dedicated sentence at the end of paragraph.

https://github.com/llvm/llvm-project/pull/93827