[clang] [clang-format] Fix poor spacing in `AlignArrayOfStructures: Left` (PR #77868)

[Owen Pan via cfe-commits]

================
@@ -1366,11 +1366,12 @@ void WhitespaceManager::alignArrayInitializersLeftJustified(
   auto &Cells = CellDescs.Cells;
   // Now go through and fixup the spaces.
   auto *CellIter = Cells.begin();
-  // The first cell needs to be against the left brace.
-  if (Changes[CellIter->Index].NewlinesBefore == 0)
-    Changes[CellIter->Index].Spaces = BracePadding;
-  else
-    Changes[CellIter->Index].Spaces = CellDescs.InitialSpaces;
+  // The first cell of every row needs to be against the left brace.
+  for (const auto *Next = CellIter; Next; Next = Next->NextColumnElement)
+    if (Changes[Next->Index].NewlinesBefore == 0)
+      Changes[Next->Index].Spaces = BracePadding;
+    else
+      Changes[Next->Index].Spaces = CellDescs.InitialSpaces;
----------------
owenca wrote:

```suggestion
  for (const auto *Next = CellIter; Next; Next = Next->NextColumnElement) {
    auto &Change = Changes[Next->Index];
    Change.Spaces = Change.NewlinesBefore == 0 ? BracePadding : CellDescs.InitialSpaces;
  }
```

https://github.com/llvm/llvm-project/pull/77868