[clang] [clang-format] Don't always break before << between string literals (PR #92214)

[Owen Pan via cfe-commits]

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@@ -10539,6 +10539,17 @@ TEST_F(FormatTest, KeepStringLabelValuePairsOnALine) {
       "                  bbbbbbbbbbbbbbbbbbbbbbb);");
 }
 
+TEST_F(FormatTest, WrapBeforeInsertionOperatorbetweenStringLiterals) {
+  verifyFormat("QStringList() << \"foo\" << \"bar\";");
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owenca wrote:

No, because the single-argument version of `verifyFormat` is a more stringent test than `verifyNoChange` as the former also tests the input with all optional whitespace characters between tokens removed.

https://github.com/llvm/llvm-project/pull/92214