[clang] [clang][AST] Pretty-print default template template args (PR #162134)

[Matheus Izvekov via cfe-commits]

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@@ -124,7 +124,7 @@ AST Dumping Potentially Breaking Changes
     ``__atomic_test_and_set(p, 0)``
 
 - Pretty-printing of templates with inherited (i.e. specified in a previous
-  redeclaration) default arguments has been fixed.
+  redeclaration) and template default arguments has been fixed.
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mizvekov wrote:

I'd advise to add a separate entry to the change log, and say something to the effect you have fixed pretty printing of default arguments to template template parameters.

https://github.com/llvm/llvm-project/pull/162134