[clang] [clang-format] Add Options to break inside the TableGen DAGArg. (PR #83149)

[Björn Schäpers via cfe-commits]

================
@@ -332,6 +332,84 @@ TEST_F(FormatTestTableGen, Assert) {
   verifyFormat("assert !le(DefVar1, 0), \"Assert1\";\n");
 }
 
+TEST_F(FormatTestTableGen, DAGArgBreakElements) {
+  FormatStyle Style = getGoogleStyle(FormatStyle::LK_TableGen);
+  Style.ColumnLimit = 60;
+  // By default, the DAGArg does not have a break inside.
+  verifyFormat("def Def : Parent {\n"
----------------
HazardyKnusperkeks wrote:

```suggestion
  ASSERT_EQ(Style.TableGenBreakInsideDAGArg, FormatStyle::DAS_DontBreak);
  verifyFormat("def Def : Parent {\n"
```

https://github.com/llvm/llvm-project/pull/83149