[clang] [clang] disallow narrowing when matching template template parameters (PR #124313)

[Erich Keane via cfe-commits]

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@@ -329,6 +329,7 @@ C++17 Feature Support
 ^^^^^^^^^^^^^^^^^^^^^
 - The implementation of the relaxed template template argument matching rules is
   more complete and reliable, and should provide more accurate diagnostics.
+  This implements `P3310R5: Solving issues introduced by relaxed template template parameter matching <https://wg21.link/p3310r5>`_ and `P3579R0: Fix matching of non-type template parameters when matching template template parameters <https://wg21.link/p3579r0>`_.
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erichkeane wrote:

needs line breaks.

https://github.com/llvm/llvm-project/pull/124313