[clang] [Clang] Separate implicit int conversion on negation sign to new diagnostic group (PR #139429)

[Steven Wu via cfe-commits]

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@@ -352,6 +352,10 @@ Improvements to Clang's diagnostics
 - Now correctly diagnose a tentative definition of an array with static
   storage duration in pedantic mode in C. (#GH50661)
 
+- Split diagnosis of implicit integer comparison on negation to a new
+  diagnostic group ``-Wimplicit-int-comparison-on-negation``, grouped under
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cachemeifyoucan wrote:

typo here: it spells `-Wimplicit-int-conversion-on-negation` in the actual implementation 

https://github.com/llvm/llvm-project/pull/139429