[clang] [Clang] Remove __is_nullptr (PR #99038)

[Aaron Ballman via cfe-commits]

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@@ -117,7 +121,7 @@ Improvements to Clang's diagnostics
 - Some template related diagnostics have been improved.
 
   .. code-block:: c++
-    
+
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AaronBallman wrote:

Spurious whitespace change.

https://github.com/llvm/llvm-project/pull/99038