[clang] [clang-format] Add BreakBeforeTemplateClose option (PR #118046)

[via cfe-commits]

================
@@ -2252,6 +2252,25 @@ struct FormatStyle {
   /// \version 16
   BreakBeforeInlineASMColonStyle BreakBeforeInlineASMColon;
 
+  /// If ``true``, a line break will be placed before the ``>`` in a multiline
+  /// template declaration.
+  /// \code
+  ///    true:
+  ///    template <
+  ///        typename Foo,
+  ///        typename Bar,
+  ///        typename Baz
+  ///    >
+  ///
+  ///    false:
+  ///    template <
+  ///        typename Foo,
+  ///        typename Bar,
+  ///        typename Baz>
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leijurv wrote:

No, I don't intend the `>` to be forced onto its own line. For instance, see this test case:

```
  verifyFormat("void foo() {\n"
               "  myFunc<\n"
               "      Loooooooooooooooooooooooooooooooooooooooong\n"
               "  >();\n"
               "}",
               Style);
```

https://github.com/llvm/llvm-project/pull/118046