[clang] [clang] Enable C++17 relaxed template template argument matching by default (PR #89807)

[Matheus Izvekov via cfe-commits]

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@@ -0,0 +1,115 @@
+// RUN: %clang_cc1 %s -fsyntax-only -std=c++23                                     -verify=expected,new
+// RUN: %clang_cc1 %s -fsyntax-only -std=c++23 -fno-relaxed-template-template-args -verify=expected,old
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mizvekov wrote:

Okay, I think I misunderstood then what `CXX/drs` was about, I should probably move it elsewhere.

https://github.com/llvm/llvm-project/pull/89807