Improve formatting

(cherry picked from commit a298b41)

Author: DougGregor

CodeGeneration/Sources/generate-swift-syntax/templates/swiftsyntax/SyntaxNodesFile.swift

@@ -176,8 +176,8 @@ func syntaxNode(nodesStartingWith: [Character]) -> SourceFileSyntax {
           // If needed, this could be added in the future, but for now withUnexpected should be sufficient.
           if let childNode = SYNTAX_NODE_MAP[child.syntaxNodeKind]?.collectionNode,
             !child.isUnexpectedNodes,
-            case .collection(_, collectionElementName: let childElt?, _, _, generateDeprecatedAddFunction: true) = child
-              .kind
+            case .collection(_, collectionElementName: let childElt?, _, _, generateDeprecatedAddFunction: true) =
+              child.kind
           {
             let childEltType = childNode.collectionElementType.syntaxBaseName