[clang-tools-extra] [clang-tidy] Fix false positives with template in `misc-unconventional-assign-operator` check (PR #143292)

[via cfe-commits]

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@@ -204,6 +204,11 @@ Changes in existing checks
   <clang-tidy/checks/misc/redundant-expression>` check by providing additional
   examples and fixing some macro related false positives.
 
+- Improved :doc:`misc-unconventional-assign-operator
+  <clang-tidy/checks/misc/unconventional-assign-operator>` check by fixing
+  false positives when copy assignment operator function in a template class
+  returns the result of another assignment to ``*this``(``return *this=...``).
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EugeneZelenko wrote:

```suggestion
  returns the result of another assignment to ``*this`` (``return *this=...``).
```

https://github.com/llvm/llvm-project/pull/143292