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

Fixes llvm/llvm-project#62904

`AlignArrayOfStructures: Left` combined with `SpacesInParentheses: true`
causes the first cell of every row to have 1 additional space.
We were only setting the first cell of the first row to be against the
left brace, now every row will be against the left brace.

1 files changed, 6 insertions, 5 deletions

diff --git a/clang/lib/Format/WhitespaceManager.cpp b/clang/lib/Format/WhitespaceManager.cpp
index 8415c8d..df84f97 100644
--- a/clang/lib/Format/WhitespaceManager.cpp
+++ b/clang/lib/Format/WhitespaceManager.cpp
@@ -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) {
+    auto &Change = Changes[Next->Index];
+    Change.Spaces =
+        Change.NewlinesBefore == 0 ? BracePadding : CellDescs.InitialSpaces;
+  }
   ++CellIter;
   for (auto i = 1U; i < CellDescs.CellCounts[0]; i++, ++CellIter) {
     auto MaxNetWidth = getMaximumNetWidth(