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

[Owen Pan 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>
----------------
owenca wrote:

We should make it an `enum` in order to handle more cases (now or in another patch), e.g.:
- Always
- BlockIndent
```
template <
    typename Foo, typename Bar,
    typename Baz
>
```
- Leave
- Multiline
```
template <typename Foo, typename Bar,
          typename Baz
>
```
- Never

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