[clang] [clang-format] revert to string << string handling to previous default (PR #88490)

[Björn Schäpers via cfe-commits]

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@@ -2193,6 +2193,41 @@ struct FormatStyle {
   /// \version 3.7
   bool BreakBeforeTernaryOperators;
 
+  /// Different ways to Break Between Chevrons.
+  enum BreakChevronOperatorStyle : int8_t {
+    /// Break using ColumnLimit rules.
+    /// \code
+    ///   os << "aaaaa" << "bbbbb" << "\n";
+    /// \endcode
+    BCOS_Never,
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HazardyKnusperkeks wrote:

Maybe call it _normal_? It certainly isn't never, as you yourself documented.

https://github.com/llvm/llvm-project/pull/88490