[clang] [clang-format] add an option to insert a space only for non-code block empty braces, not for empty parentheses (PR #93634)

[Björn Schäpers via cfe-commits]

================
@@ -14027,6 +14027,11 @@ TEST_F(FormatTest, LayoutCxx11BraceInitializers) {
   SpaceBetweenBraces.SpacesInParens = FormatStyle::SIPO_Custom;
   SpaceBetweenBraces.SpacesInParensOptions.InEmptyParentheses = true;
   verifyFormat("vector< int > x{ };", SpaceBetweenBraces);
+  SpaceBetweenBraces.SpacesInParens = FormatStyle::SIPO_Custom;
+  SpaceBetweenBraces.SpacesInParensOptions.InEmptyParentheses = false;
+  SpaceBetweenBraces.SpacesInParensOptions.Other = false;
+  SpaceBetweenBraces.SpacesInParensOptions.InEmptyBraces = true;
+  verifyFormat("T x = { };\nf(x, { });\ng();", SpaceBetweenBraces);
----------------
HazardyKnusperkeks wrote:

```suggestion

  SpaceBetweenBraces.SpacesInParensOptions.InEmptyParentheses = false;
  SpaceBetweenBraces.SpacesInParensOptions.Other = false;
  SpaceBetweenBraces.SpacesInParensOptions.InEmptyBraces = true;
  verifyFormat("T x = { };\n"
               "f(x, { });\n"
               "g();", SpaceBetweenBraces);
```

https://github.com/llvm/llvm-project/pull/93634
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