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

[Richard Smith via cfe-commits]

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@@ -127,8 +127,10 @@ C2y Feature Support
   that ``_Generic`` selection associations may now have ``void`` type, but it
   also removes UB with code like ``(void)(void)1;``.
 - Implemented `WG14 N3411 <https://www.open-std.org/jtc1/sc22/wg14/www/docs/n3411.pdf>`_
-  which allows a source file to not end with a newline character. This is still
-  reported as a conforming extension in earlier language modes.
+  which allows a source file to not end with a newline character. Note,
+  ``-pedantic`` will no longer diagnose this in either C or C++ modes as an
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zygoloid wrote:

This sounds to me like you're saying that not diagnosing this is an extension. Maybe drop the "as an extension" part?

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