[clang] [clang-format] TableGen multi line string support. (PR #78032)

[Björn Schäpers via cfe-commits]

================
@@ -272,6 +274,14 @@ void FormatTokenLexer::tryMergePreviousTokens() {
       return;
     }
   }
+  if (Style.isTableGen()) {
+    if (tryMergeTokens({tok::l_square, tok::l_brace},
----------------
HazardyKnusperkeks wrote:

```suggestion
  if (Style.isTableGen() && tryMergeTokens({tok::l_square, tok::l_brace},
```

https://github.com/llvm/llvm-project/pull/78032