class RDoc::ERBIO

def initialize str, safe_level = nil, trim_mode = nil, eoutvar = 'io'
  if RUBY_VERSION >= '2.6'
    super(str, trim_mode: trim_mode, eoutvar: eoutvar)
  else
    super
  end
end

def set_eoutvar compiler, io_variable
  compiler.put_cmd    = "#{io_variable}.write"
  compiler.insert_cmd = "#{io_variable}.write"
  compiler.pre_cmd    = []
  compiler.post_cmd   = []
end