Fix CodeGenerationFormat to not add extra indentation

Author: roopekv

CodeGeneration/Sources/Utils/CodeGenerationFormat.swift

@@ -104,6 +104,25 @@ public class CodeGenerationFormat: BasicFormat {
     }
   }
 
+  public override func requiresIndent(_ node: some SyntaxProtocol) -> Bool {
+    switch node.kind {
+    case .arrayElementList, .dictionaryElementList, .functionParameterList, .labeledExprList:
+      let indentManually = node.children(viewMode: .sourceAccurate).count > maxElementsOnSameLine
+      if indentManually {
+        return false
+      }
+      let startsOnNewline =
+        node.leadingTrivia.contains { $0.isNewline }
+        || node.previousToken(viewMode: .sourceAccurate)?.trailingTrivia.contains { $0.isNewline } ?? false
+      if !startsOnNewline {
+        return false
+      }
+    default:
+      break
+    }
+    return super.requiresIndent(node)
+  }
+
   // MARK: - Private
 
   private func shouldBeSeparatedByTwoNewlines(node: CodeBlockItemSyntax) -> Bool {
@@ -124,16 +143,16 @@ public class CodeGenerationFormat: BasicFormat {
     children: SyntaxChildren,
     elementType: SyntaxType.Type
   ) -> [SyntaxType] {
-    increaseIndentationLevel()
-    var formattedChildren = children.map {
-      self.rewrite($0.cast(SyntaxType.self)).cast(SyntaxType.self)
+    var formattedChildren = children.map { child in
+      var child = child.cast(SyntaxType.self)
+      child.leadingTrivia = Trivia(pieces: child.leadingTrivia.drop(while: \.isWhitespace))
+      return self.rewrite(child).cast(SyntaxType.self)
     }
-    formattedChildren = formattedChildren.map {
-      if $0.leadingTrivia.first?.isNewline == true {
-        return $0
-      } else {
-        return $0.with(\.leadingTrivia, indentedNewline + $0.leadingTrivia)
-      }
+    increaseIndentationLevel()
+    formattedChildren = formattedChildren.map { child in
+      var child = child
+      child.leadingTrivia = indentedNewline + child.leadingTrivia
+      return child
     }
     decreaseIndentationLevel()
     if let lastChild = formattedChildren.last {