[clang-tools-extra] [clang-tidy] add default error message for performance-avoid-endl (PR #107867)

[Julian Schmidt via cfe-commits]

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@@ -123,6 +123,10 @@ Changes in existing checks
   <clang-tidy/checks/modernize/use-std-print>` check to support replacing
   member function calls too.
 
+- Improved :doc:`performance-avoid-endl
+  <clang-tidy/checks/performance/avoid-endl>` check to use ``std::endl`` as
+  placeholder when lexer cannot get source text.
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5chmidti wrote:

Sounds better IMO
> as a default when the lexer can not retrieve the source text.

https://github.com/llvm/llvm-project/pull/107867