[clang] [clang-tools-extra] Suppress pedantic diagnostic for a file not ending in EOL (PR #131794)

[via cfe-commits]

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@@ -1,11 +1,16 @@
-// RUN: %clang_cc1 -fsyntax-only -Wnewline-eof -verify %s
-// RUN: %clang_cc1 -fsyntax-only -pedantic -verify %s
-// RUN: %clang_cc1 -fsyntax-only -x c++ -std=c++03 -pedantic -verify %s
-// RUN: %clang_cc1 -fsyntax-only -Wnewline-eof %s 2>&1 | FileCheck %s
+// Allowing a file to end without a newline was adopted as a Defect Report in
+// WG21 (CWG787) and in WG14 (added to the list of changes which apply to
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cor3ntin wrote:

Can you add a test in the appropriate c++ dr test file ?
I'm happy  with just adding // dr787 : yes + a comment pointing to this test file
(+ rebuilding cxx_dr_status)

https://github.com/llvm/llvm-project/pull/131794