class Herb::AST::ERBEnsureNode

def tree_inspect(indent = 0)
  output = +""
  output += "@ #{node_name} "
  output += location.tree_inspect
  output += "\n"
  output += inspect_errors(prefix: "│   ")
  output += "├── tag_opening: "
  output += tag_opening ? tag_opening.tree_inspect : "∅"
  output += "\n"
  output += "├── content: "
  output += content ? content.tree_inspect : "∅"
  output += "\n"
  output += "├── tag_closing: "
  output += tag_closing ? tag_closing.tree_inspect : "∅"
  output += "\n"
  output += "└── statements: "
  output += inspect_array(statements, prefix: "    ")
  output += "\n"
  output.gsub(/^/, "    " * indent)
end