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

[via cfe-commits]

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@@ -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:

Would `Always` look like:

```
template<typename T
>
```

For the overall indentation / line breaking of the various typenames, I left that untouched. All that stuff went way above my head. I didn't really have an intent in mind between your described options of BlockIndent vs Multiline but yes, I suppose what I have here is Multiline.

So, should I change this from a true/false to an enum of Multiline/Never?

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