message: Move space to the comparison join
diff: @@ -40,7 +40,7 @@ public:
  static string ToString(const T &entry) {
  string result = entry.children[0]->ToString();
  for (idx_t i = 1; i < entry.children.size(); i++) {
  - result += ExpressionTypeToOperator(entry.type) + entry.children[i]->ToString();
  + result += " " + ExpressionTypeToOperator(entry.type) + " " + entry.children[i]->ToString();
  }
  return result;
  }
  