[clang] [clang-format] Option to ignore macro definitions (PR #70338)

[Owen Pan via cfe-commits]

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@@ -2443,6 +2443,10 @@ struct FormatStyle {
   /// \version 13
   std::vector<std::string> IfMacros;
 
+  /// Ignore formatting in preprocessor definitions.
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owenca wrote:

```suggestion
  /// Do not format macro definitions.
```

https://github.com/llvm/llvm-project/pull/70338